We've run, jumped, and stomped all over the world of Super Mario, but, where in the universe is Super Mario EXACTLY? It's virtual so it obviously DOESN'T exist, but if it did, could Super Mario world be in our solar system? And what do the planet's dynamics reveal about Mario's crazy jumping ability? Join Gabe as he takes us on a rick-roaring tour of our known universe as we search for the answer in this week's SpaceTime!

We've run, jumped, and stomped all over the world of Super Mario, but, where in the universe is Super Mario EXACTLY? It's virtual so it obviously DOESN'T exist, but if it did, could Super Mario world be in our solar system? And what do the planet's dynamics reveal about Mario's crazy jumping ability? Join Gabe as he takes us on a rick-roaring tour of our known universe as we search for the answer in this week's SpaceTime!

Aliens! Could humans really be alone in this expansive universe? And if we're not, how come we've never made contact with other intelligent life? Everyone's thought about it; especially members of the scientific community. Join Gabe as he presents some of the most popular theories that scientists use to rationalize their support or skepticism of the existence of aliens. We may never know the answer to this age old question, but a little scientific thinking never hurt anybody!

The universe is HUGE. But, there is only so much of the universe we can ACTUALLY see, and if we wanted to measure that FINITE space, how would we do it? A gigantic ruler? One really long car ride? Or maybe it's something even more spectacular, something that involves not only the observable universe as it is NOW, but how it was when it was first BORN?

Mars One. The Mars Rover. Bruno Mars. Mars Bars. It's pretty clear we're OBSESSED with the idea of Mars, especially in regard to it being a potential colony for earthlings. But is that really the best option? Is there a better place for us to colonize in our solar system? Well, how about Venus? Sure the surface temperature is over 450 degrees Celsius, with crazy pressure, but there might be a smart way around that, making Venus a better option for long term colonization than Mars!

Killing all the life on Earth is easy. But what about destroying the planet itself? That is DEFINITELY going to happen!! But HOW? Could it be Nukes? A Giant Asteroid? A Collision with another planet? And what’s more, will anyone be around to actually watch the world reach its ultimate demise?

DO A BARREL ROLL! Or at least, try…? The iconic move from Star Fox seems so easy, just press a button and BOOM. The ship rolls. But HOW? Barrel rolls in atmosphere are easy to execute with the use of ailerons, but in space, it's a different issue altogether. With no atmosphere (and no thrusters), how does one Barrel Roll like Star Fox in space?

HAS SPACE ALWAYS BEEN BLACK? As long as we've been around, YES. But the universe gets much more exciting, AND much BRIGHTER, as we start winding our clocks back to the early days of the universe. Near the beginning of the universe, when space was rapidly expanding, that dark night sky we know so well as actually…ORANGE! But why? Did the lights just go out, or did something more spectacular happen?

Is Link in Majora's Mask actually being overseen by a Black Hole (with teeth)? It's easy to take things at face value in video games. But when we take a deeper dive into the physics in The Legend of Zelda: Majora's Mask, it seems that the "MOON" might be one of those things that isn't quite what it seems. Given its size and the way it affects Termina, it actually appears that the moon is really a BLACK HOLE! Is that seriously the only possibility? What is the evidence that supports this theory?

Listen, we know you've thought about it, and we're here to give you THE DEFINITIVE ANSWER to one of the greatest science questions of all time. How long would it take to get to the MOON by farting?

EVER WANTED TO WEIGH A FART? Well, it isn't easy, but walk through the math, physics, and science behind farts and how to measure them!

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

Last time we talked about what curvature means, looked at geodesics, great circles on spheres, and tried to understand the notion of "straightness". This week on Spacetime, we take a detour into how geometry works in spacetime. Get excited, because this episode is even more mind-bending than the last!

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

We all know tides have something to do with gravity from the Moon and Sun, but if gravity affects the motion of all objects equally, then how come oceans have large tides while other bodies of water don't? It's because your mental picture of the tides is probably WRONG!!! Join Gabe on this week’s episode of PBS Space Time as he sets the record straight on tidal force, gravitational differential and what role the moon actually plays in tides. Why don't lakes have tides? Watch the episode to find out!

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

Lots of people believe the Universe is infinite, but there's a good possibility that might not be the case. Which means that there would be an actual edge of the Universe. What happens at that edge? Is there a restaurant? Join Matt on this week’s episode of Space Time as he explores the greatest expanses of our Universe. So what do you find when you reach the edge? More Universe? Bubble Universes? Back where you started?! Check out this episode of Space Time to find out!

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

We know that mass is energy… but what is energy? And where did matter and time even come from? Matt begins to dive into these intricate topics by first examining what inertial mass is, how it relates to gravitational mass, and what it all means for mass as a fundamental property.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

The Kepler telescope recently noticed a strange partial eclipse that some have speculated could be a Dyson Sphere. Are Dyson Sphere's possible? Are they practical? What other alternatives to futuristic energy capture do we have to choose from? Why not a kugelblitz - a swarm of black hole powered engines?

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

We’ll soon be capable of building self-replicating robots. This will not only change humanity’s future but reshape the galaxy as we know it.

Albert Einstein strongly disagreed with Niels Bohr when it came to Bohr’s interpretation of quantum mechanics. Quantum entanglement settled the argument once and for all.

The Hubble Telescope found more evidence of vast plumes of water bursting through the icy surface of Jupiter’s moon Europa. What does this tell us about the potential for life on Europa?

The Drake Equation tells us the likelihood that there are other advanced technological civilizations waiting for us among the stars. In this episode of Space Time we challenge you to use the Drake Equation to help us determine how near or far these alien races may be. Links to reference material below.

Primordial black holes may be lurking throughout our universe. How large are they, how many are out there and what would happen if they moved through our solar system?

Elon Musk’s SpaceX program proposes that 100 people could be sent to colonize Mars within 10 years. What might that colony look like?

Is our universe a definitive single reality or is it merely one within an infinitely branching multiverse?

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

Are aliens watching Earth TV? We'd like to credit the SKA Organization for the image used in the thumbnail.

Find out how scientists are mapping the black holes throughout the Milky Way and beyond as well as the answer to the Escape the Kugelblitz Challenge Question. Were you able to save humanity?

Because you demanded it … we break down the EM Drive!

Isaac Newton’s Universal Law of Gravitation tells us that there is a singularity to be found within a black hole, but scientists and mathematicians have found a number of issues with Newton’s equations. They don’t always accurately represent reality. Einstein’s General Theory of Relativity is a more complete theory of gravity. So does using the General Theory of Relativity eliminate the singularity? No. Not only does it concur with Newton’s Universal Law of Gravitation but it also reveals a second singularity, not at the center of the black hole but at the event horizon.

When Quasars were first discovered the amount of light pouring out of such a tiny dot in space seemed impossible. A hysterical flurry of hypothesizing followed: swarms of neutron stars, alien civilizations harnessing their entire galaxy’s power, bright, fast-moving objects being ejected by our own galaxy’s core. But by the 1980’s we were converging on the most awesome explanation. It goes a little like this: Take a black hole of millions to billions times the mass of the sun. Where from? It turns out every decent-sized galaxy has one at its core. Now drive gas into the galactic core. One way this can happen is when galaxies merge and grow. That gas descends into the waiting black hole’s gravitational well and gains incredible speed on the way. It is swept up in a raging whirlpool around the black hole that we call an accretion disk, where its energy of motion is turned into heat. The heat-glow of the accretion disk is so bright that we can see quasars to the ends of the universe.

In this episode we dive deeper into the relationship between space and time and explore how we can geometrically map the causality of the universe and increase our understanding of how time and distance relate to one another.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

Fomalhaut is a massive young star surrounded by a ring of dust debris that can tell us a great deal about the formation of our own solar system.

Can humanity survive on one of the seven earth-like Trappist-1 planets?

Last week, seven earth-like planets were discovered orbiting a Red Dwarf star 39 light years away. Each one could be capable of supporting life.

You’ve discovered a habitable exoplanet, but so has an an evil interplanetary mining corporation. Can you get to the planet before they strip it bare and leave it unsuitable for life? You’re going to need a ship, the Lorentz Transformation and the Wait Equation. Hang on, it’s going to be a bumpy ride.

In this episode of the Space Time Journal Club Matt discusses how two independent research teams created their own Time Crystals, a form of matter that breaks time translational symmetry and could be used in quantum computers.

Find out how traveling faster than light and traveling back in time are the same thing.

Find out how time and space switch roles when we move beyond the event horizon of the black hole.

Find out about China’s current telescope on the moon and what the future plans are for mounting larger telescopes on the lunar surface.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

In 1991 a single atomic nucleus slammed into our atmosphere with the intensity of a macroscopic object. It’s been named The Oh My God Particle.

Was an incredible drop in entropy responsible for the Big Bang? If that’s the case, this would lead us to conclude that a great many other things are possible, including the likelihood that you are a Boltzmann Brain.

Neil deGrasse Tyson sits down with Matt to discuss Ancestor Simulations. And check out Matt and Neil discussing how sure we are about our map of the universe

The first total solar eclipse in over 40 years is about to hit the United States.

What will become of humanity after spend a few hundred years on Mars? What will happen after a few thousand? Evolution has, and still is, shaping humanity in rather drastic ways. How long will humans stop being human and become Martian?

Soon after the Big Bang, the first generation of monstrously large stars ignited, lit up the universe, and then died. The resulting swarms of supernova explosions enriched the universe with the first heavy elements and LOTs of black holes. They shaped everything that came after. These were the stars of Population III, and they are one of the most enduring mysteries in astrophysics.

If you study a map of the Cosmic Microwave Background, or CMB, you may notice a large, deep blue splotch on the lower right. This area, creatively named the Cold Spot. Is this feature a statistical fluke, the signature of vast supervoids, or even the imprint of another universe?

Paul Dirac’s insights into the nature of Quantum Mechanics laid the foundation for Quantum Field Theory and predicted the existence of anti-matter.

Quantum mechanics is perhaps the most unintuitive theory ever devised. And yet it’s also the most successful, in terms of sheer predictive power. Simply by following the math of quantum mechanics, incredible discoveries have been made. Its wild success tells us that the mathematical description provided by quantum mechanics reflects deep truths about reality. And by far the most successful, most predictive formulation of quantum mechanics is quantum field theory. It is our best description we have of the fundamental workings of reality. And the first part of quantum field theory that was derived – quantum electrodynamics – is the most precise, most accurate of all.

How to predict the path of a quantum particle. Part 3 in our Quantum Field Theory Series.

How do you calculate infinite quantum outcomes? Feynman Diagrams.

Anti-Satellite weaponry, giant X-ray lasers and kinetic impact missiles nicknamed the “Rods from God.” Find out about the history of the real star wars that have been waged over the past 50 years.

Unlock the secrets of Feynman Diagrams. Part 5 in our Quantum Field Theory series. And if you're submitting an answer to our challenge question email your answer by August 2nd to pbsspsacetime@gmail.com with the subject line "Feynman Diagram Challenge."

Why does the universe seem to be moving in one particular direction?

Could it be that all the electrons in the universe are simply one, single electron moving back and forth through time?

Earth has its share of monster storms, but even our most powerful hurricanes are a breeze compared to the great, planet-sized tempests of the gas giants.

What does life look like from space?

Black holes are very well known but... What is a White Hole?

LIGO may have just detected gravitational waves from the collision of two Neutron Stars.

The mysteries of our universe seem limitless. However to unlock them, we’re going to need some incredible technologies to peer deeper and more sharply into space time.

The laws of physics are the same everywhere in the universe. At least we astrophysicists hope so. After all, it’s hard to unravel the complexities of distant parts of the universe if we don’t know the basic rules. But what if this is wrong? There is a hint of evidence that the fundamental constants that govern our universe may evolve over time, and even from one location to another.

So what happens when two Super Massive Black Holes collide? We may be about to find out, because astronomers have spotted a pair of them in a close binary orbit for the very first time.

Can we ever achieve absolute cold?

It turns out that "nothing" is one of the most interesting somethings in all of physics.

For years, astronomers have been unable to find up to half of the matter in the universe. We may just have solved this problem. Fingers crossed.

If vacuum energy really does have the enormous value predicted by quantum field theory then our gently expanding, geometrically flat universe shouldn’t exist. This is the vacuum catastrophe.

Let’s talk about the mysterious zero-point energy and what it really can, and really can’t do.

Let’s take a moment to remember the selfless sacrifices made by some amazing robotic explorers. And be sure to learn more about your personal DNA story by going to 23andMe.com/spacetime and taking advantage of their special holiday offer.

The future of science is you.

Sometimes intuitive, large-scale phenomena can give us incredible insights into the extremely unintuitive world of quantum mechanics.

We were recently visited by a traveler from outside our solar system. This is the first time we’ve ever seen an object that came to us from interstellar space. It's name is 'Oumuamua.

Find out about the last time and the next time the Earth will be hit by a Gamma-ray Burst.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

We can now map the interiors of stars by “listening” to their harmonies as they vibrate with seismic waves.

Learn about Horizon radiation and why it's essential for us to understand as we continue our journey towards the Unruh Effect and Hawking Radiation.

The Sun is slowly burning through its fuel. Hydrogen is fused into helium in the Sun’s core, producing energy that keeps it shining, and keeping the Earth warm and hospitable to life. But that fuel WILL run out, after which the Sun will swell into a red giant and flash-fry the Earth. But in fact that frying – well, slow-roasting – will begin much earlier. See, the Sun is getting brighter even now. This has complex, and for the most part terrible implications for life. The end of the world will come sooner than you think.

What happens when a star eats its planets? Find out on today’s Space Time Journal Club.

Energy is the most powerful and useful concept in all of physics, but what exactly is it?

What exactly will happen when the sun dies?

Do you have what it takes to calculate the awesome power of the trebuchet?

Will the future of space exploration be guided by public or private entities? Which is better?

It’s the most famous prediction of perhaps the most famous genius of our time ... Stephen Hawking's theory of Hawking Radiation

What do the first stars in the universe, dark matter, and superior siege engines have in common?

The Andromeda galaxy is heading straight toward our own Milky Way. The two galaxies will inevitably collide. Will that be the very last night sky our solar system witnesses?

Worried about black holes? Consider this: Every time you accelerate - you generate an event horizon behind you. The more you accelerate away from it the closer it gets. Don’t worry, it can never catch up to you, but the Unruh radiation it generates sure can.

Our universe is prone to increasing disorder and chaos. So how did it generate the extreme complexity we see in life? Actually, the laws of physics themselves may demand it.

Now that gravitational waves are definitely a thing, it’s time to think about some of the crazy things we can figure out with them. In some cases we’re going to need a gravitational wave observatory - in fact, we've already built one.

It’s been conjectured that the center of the Milky Way is swarming with tens of thousands of black holes. And now we’ve actually seen them.

If we, or any conscious being is around to witness the very distant future our galaxy, what will they see? How long will life persist as the stars begin to die?

The great advances in any science tend to come in sudden leaps. April 25th of 2018 marks the beginning of just such a leap for much of astronomy. In the early hours of the morning, the Gaia mission’s second data release dropped. Our understanding of our own galaxy will never be the same again.

Conservation laws are among the most important tools in physics. They feel as fundamental as you can get. And yet they’re wrong - or at least they’re only right sometimes. These laws are consequences of a much deeper, more fundamental principle: Noether’s theorem.

If you have perfect knowledge of every single particle in the universe, can you use the laws of physics to rewind all the way back to the Big Bang? Is the entire history of the universe perfectly knowable? Or has information somehow lost along the way?

We’ve established by now that black holes are weird. The result of absolute gravitational collapse of a massive body: a point of hypothetical infinite density surrounded by an event horizon. At that horizon time is frozen and the fabric of space itself cascades inwards at the speed of light. Nothing can travel faster than light, and so nothing can escape from below the event horizon- not matter, not light, not even information.

We’ve established by now that black holes are weird. The result of absolute gravitational collapse of a massive body: a point of hypothetical infinite density surrounded by an event horizon. At that horizon time is frozen and the fabric of space itself cascades inwards at the speed of light. Nothing can travel faster than light, and so nothing can escape from below the event horizon- not matter, not light, not even information.

The days of oil may be numbered, but there’s another natural resource that’s never been touched, Asteroids.

Since the discovery of the Higgs boson, physicists have searched and searched for any hint of new particles. That search has been fruitless. Until, perhaps, now. Today on Space Time Journal Club we’ll look at a paper that reports a compelling hint of a new particle outside the standard model: the sterile neutrino.

In simple terms a gauge theory is one that has mathematical parameters, or “degrees of freedom” that can be changed without affecting the predictions of the theory.

Entropy and the second law of thermodynamics has been credited with defining the arrow of time.

Can a demon defeat the 2nd Law of Thermodynamics?

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

Let’s talk about the best evidence we have that the theories of quantum physics truly represent the underlying workings of reality.

We live in an unusual age – the age when the stars still shine. We should count ourselves lucky – nearly all of future history will be dark. But events will still unfold in that long, cooling darkness, and civilizations may endure. So how will the universe and its far-future denizens spend eternity?

There is no greater hero in our search for life on mars than a little robot named Opportunity.

Black Holes should have no entropy, but they in fact hold most of the entropy in the universe. Let’s figure this out.

There’s quite a bit of stuff in the universe, to put it mildly.

Between them, general relativity and quantum mechanics seem to describe all of observable reality.

Physics seems to be telling us that it’s possible to simulate the entire universe on a computer smaller than the universe.

Physics seems to be telling us that it’s possible to simulate the entire universe on a computer smaller than the universe.

Why strings? What are they made of? How did physicists even come up with this bizarre idea? And what’s all this nonsense of extra dimensions?

The silence of the galaxy and the resulting Fermi Paradox has perplexed us for nearly 50 years. But our most recent surveys of the Milky Way finally allow us to draw scientific conclusions about the depressingly persistent absence of aliens.

Let me tell you a story about virtual particles. It may or may not be true.

Some see string theory as the one great hope for a theory of everything – that it will unite quantum mechanics and gravity and so unify all of physics into one glorious theory.

With the large hadron collider running out of places to look for clues to a deeper theory of physics, we need a bigger particle accelerator. We have one - the galaxy.

To repeat the space time maxim: it’s never aliens … until it is. So let’s talk about ‘oumuamua.

How did life on Earth get started? Did life on Earth originate on another planet? Either Mars, or in a distant solar system? Could Earth life have spread to have seeded life elsewhere? Let’s see what modern science has to say about the plausibility of panspermia.

When you look in mirror, and see what you think is a perfect reflection. You might be looking at universe whose laws are fundamentally different.

There’s this idea that beauty is a powerful guide to truth in the mathematics of physical theory. String theory is certainly beautiful in the eyes of many physicists. Beautiful enough to pursue even if it’s wrong?

Astronomers are the worst at naming things. Dark energy AND dark matter? Who can remember which is which. But perhaps one astronomer has just fixed it, with a theory that says perhaps actually they are they same stuff.

The foundations of quantum theory rests on its symmetries. For example, it should be impossible to distinguish our universe from one that is that is the perfect mirror opposite in charge, handedness, and the direction of time. But one by one these symmetries were found to be broken, threatening to break all of physics along with them.

The search for a single number: the hubble constant, which is the rate of expansion of our universe, has consumed astronomers for generations. Finally, two powerful and independent methods have refined its measurement to unprecedented precision. The only problem is that they don’t agree. This calls into question some of our most basic assumptions about the universe.

Exotic matter – matter with negative mass - has long been the pipedream of science fiction writers, futurists, and certain rather. . . optimistic researchers. It’s the key to faster than light travel because it’s the only stuff that can curve space in the right way to hold open wormholes and construct warp fields. And if you can travel faster than light you can also travel backwards in time. We’ve been over those already. And we also recently covered a very new use for negative mass: as “dark fluid”, a proposed explanation for both dark matter and dark energy. That episode really got me thinking about the subtleties of negative mass and how it should really behave gravitationally. Turns out it’s complicated, and to answer it we really have to question the very definition of mass.

Invisible to the naked eye, our night sky is scattered with the 100s of billions of galaxies the fill the known universe. Like the stars, these galaxies form constellations – hidden patterns that echo the reverberations of matter and light in an epoch long before galaxies ever formed. These are the baryon acoustic oscillations, and they may hold the key to understanding the nature of dark energy.

Hook up an old antenna to your TV and scan between channels. The static buzz you hear is mostly due to the ambient radio produced by our noisy pre-galactic civilization. But around one percent of that buzz is something very different – it’s the cosmic microwave background radiation – the remnant of the heat-glow released when the hot, dense early universe became transparent for the first time. It sound likes random static, but that buzz contains an incredible wealth of hidden information. It holds the secrets of the universe’s fiery beginning.

Bad ideas come and go in physics. But there’s one bit of nonsense that is perhaps more persistent than all others: the perpetual motion machine. No working perpetual motion machine has ever been experiment verified. All break the laws of thermodynamics. In fact, we classify based on WHICH law of thermodynamics they break. We have perpetual motion machines of the first kind - they violate energy conservation - they pump more energy out than they need to keep running. This includes most of the historical devices. Then there are machines of the second kind - they’re a bit more subtle in their wrongness because break the second law of thermodynamics - extracting energy by reversing entropy. Many modern “free-energy” devices fall into this category. Now the best modern designs are by you - answers to our recent challenge question, which we’ll get to at the end. But first let’s take a look at examples of what other people came up with - this’ll be a fun little journey through some ...

The Future of Space Tourism with Richard Branson

The private space-race has been on for a while now. The attention has been on Space-X and Blue Origin with their reusable rockets. But there’s one private space program that’s been doing things a little differently. Richard Branson’s Virgin Galactic isn’t building rockets at all – it’s building spaceships. And I got to sit down and talk to him about it.

The power of Dark Energy may be increasing as the universe ages. Subtle clues are emerging that the accepted model for the nature of dark energy and dark matter may not be all that. We saw the first such clue recently in our recent episode on the Crisis in Cosmology. Today we’re doing a Space Time Journal Club to reveal another clue. We’re looking at a new paper in Nature Astronomy, “Cosmological constraints from the Hubble diagram of quasars at high redshifts” by Risaliti and Lusso. It hints that the cosmological constant may not be so constant after all. In fact it may be increasing. If this is true, then our prediction for the future of our universe looks VERY different, and may involve the entire universe tearing itself to shreds at the subatomic level in the Big Rip.

Of all the unlikely ends of the universe, the Big Rip has to be the most spectacular. Galaxies ripped to shreds, dogs and cat first living together, then tragically separated by the infinitely accelerating expansion of space on subatomic scales. Good thing it's not going to happen. Or is it?

Have you ever asked “what is beyond the edge of the universe?” And have you ever been told that an infinite universe that has no edge? You were told wrong. In a sense. We can define a boundary to an infinite universe, at least mathematically. And it turns out that boundary may be as real or even more real than the universe it contains.

We live in a universe with 3 dimensions of space and one of time. Up, down, left, right, forward, back, past, future. 3+1 dimensions. Or so our primitive Pleistocene-evolved brains find it useful to believe. And we cling to this intuition, even as physics shows us that this view of reality may be only a very narrow perception. One of the most startling possibilities is that our 3+1 dimensional universe may better described as resulting from a spacetime one dimension lower – like a hologram projected from a surface infinitely far away.

We’ve been failing to detect dark matter for decades. Finally, the latest failure to detect dark matter may have actually proved its existence. One of these is true: either most of the matter in the universe is invisible and formed of something not explained by modern particle physics OR our understanding of gravity is completely broken. The debate over which is true has raged for decades, but may finally have been resolved in an unlikely way: the proof that dark matter exists, and really is an exotic, unknown substance, may have come from the discovery of two galaxies that appear to have no dark matter at all. Today on Space Time Journal Club we’ll look at the papers that reveal this discovery.

How do you take a picture of a black hole and what can we learn from it? Our first ever actual bona fide photo of a black hole, made by the Event Horizon Telescope and revealed to the world in a press conference on April 10th. Since then it’s got plenty of coverage, because … I mean look at it. It’s a freaking black hole. It’s black, it’s holey, it’s everything we hoped it would be. Now that the giddiness has subsided and I personally have stopped spending hours on end staring at a black spot, we can take a breath and actually look at the real science here and discuss exactly how a picture like this could be taken and what we can learn from it.

Quantum computing is cool, but you know what would be extra awesome - a quantum internet. In fact if we want the first we’ll need the latter. And the first step to the quantum internet is quantum cryptography.

We live in the stelliferous era. Somewhere between 10 and 1000 billion trillion stars fill the observable universe with light. But there was a time before the first star ignited. A time we call the cosmic dark ages.

Carl Sagan’s famous words: “We are star stuff” refers to a mind-blowing idea – that most atomic nuclei in our bodies were created in the nuclear furnace and the explosive deaths of stars that lived in the ancient universe. In recent years it’s become clear that the truth is even more mind-blowing. Many heavy elements - includes most precious metals - were produced in an even more spectacular event: the collision of neutron stars. In fact, according to a recent study most of the Earth’s supply of these elements was created in a single neutron star merger that took place near our Sun’s birth nebula 80 million years ago before Earth formed.

Black holes are really only dangerous if you get too close. Ha, who am I kidding. It turns out they may be responsible for ending star formation across the entire universe.

Recently, the oldest quasar ever seen was discovered by the Gemini North telescope in Hawaii, the Magellan Telescopes at Las Campanas Observatory in Chile, as well as the Large Binocular Telescope in Arizona. In this first episode of the PBS DS mini-series, STELLAR, Matt travels to the top of Mauna Kea to visit the Gemini North telescope and see just how they found this ancient Quasar and it’s massive black hole.

Energy too cheap to meter - that was the promise of nuclear power in the 1950s, at least according to Lewis Strauss chairman of the Atomic Energy Commission. That promise has not come to pass - but with some incredible new technologies, perhaps it still could. The question is - should it?

When we finally have a quantum internet you’ll be able to simultaneously like and dislike this video. But we don’t. So I hope you like it. The world is widely regarded as being well and truly into the digital age, also called the information age. No longer are economies and industries solely characterised by the physical goods they produce, and in fact some of the largest companies in the world produce no physical goods at all: digital information is a commodity in its own right. As discussed in a previous episode, this worldwide digital economy is fundamentally reliant on certain cryptographic processes. Currently these processes work in the realm of classical cryptography, but one day soon this may not be enough and so quantum cryptographic methods and algorithms are being developed. However, it’s one thing to design a protocol, it’s something else entirely to build a system to support it. To understand what needs to be done we need to get to the foundations of quantum mech...

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

One of the fundamental questions humanity has always asked is how big is our Universe? For much of human history, people believed that Planet Earth was the very center of the entire universe. And Earth is pretty big. But compared the rest of the universe, we are infinitesimally small.

Every astronomy textbook tells us that soon after the Big Bang, there was a period of exponentially accelerating expansion called cosmic inflation. In a tiny fraction of a second, inflationary expansion multiplied the size of the universe by a larger factor than in the following 13 and a half billion years of regular expansion. This story seems like a bit of a … stretch. Is there really any mechanism that could cause something like this to happen? What what we’re covering today – the real physics of cosmic inflation.

How can you build a telescope that can see the entire night sky without moving its dish? Well in this special episode of Space Time we took a tour of the Arecibo Observatory with a VR 180 camera so you could explore the incredible ingenuity of Arecibo's giant spherical dish that allows it to reflect light from every spot on the sky in a symmetric way. We also talked to Dr. Abel Méndez about Exoplantes and Aliens!

We actually have a pretty good idea of what might have happened before the Big Bang. That is, as long as we define the Big Bang as the extremely hot, dense, rapidly expanding universe that is described by Einstein’s equations. That picture of the universe is very solid down to about a trillionth of a second after the supposed beginning of time. We can make good guesses down to about 10^-30th of a second. But before that?

Do you want to major in Astrophysics? Are you thinking about becoming (or ever just wondered how one becomes) an Astrophysicists? Do you want to know Matt O’Dowd’s origin story? Then buckle up and enjoy the ride and try your astrophysics skill in calculating bubble universes to try to win some free Space Time Swag from the Merch Store.

Earth’s magnetic field protects us from deadly space radiation. What if it were drastically weakened, as a precursor to flipping upside down? I mean, it has before … many, many times..

Humanity’s future is glorious. As we master space travel, we’ll hop from one lifeless world to the next. Life will blossom in our path and the galaxy with shimmer with beautiful Earth-like orbs. Hmmm… maybe. This won’t sound so far fetched if we prove we can do it at least once. If we successfully terraform Mars.

You know what a planet is, right? A big round thing that orbits a star. Uh, not so fast. The surprisingly vicious debate over the planetary status of Pluto has given us a fascinating glimpse into what a scientific definition really is. And perhaps the word planet is too vague to be used as a scientific definition at all.

The universe is big, but it’s peanuts compared to the eternally inflating multiverse. But just how many universes are there? What are they like? And most importantly, what can they tell us about … aliens?

Black holes are crazy enough on their own – but crash two together and you end up with a roiling blob of inescapable space that vibrates like a beaten drum. And the rich harmonics of those vibrations, seen through gravitational waves, could hold the secrets to the nature of the fabric of spacetime itself. Today on space time journal club we’ll explore the papers that claim to have detected black hole harmonics. We’ll also give you the latest updates on the most recent – in some cases quite bizarre - LIGO detections.

It’s time we talked about loop quantum gravity. What exactly is it? What are the loops? And can it really defeat string theory in our quest for a Theory of Everything?

Time travel stories are cool because both the past and future are somehow more interesting that the present and because everyone wants a redo. But so far it appears we’re doomed to live consumed by regret in the eternal, boring present. Time marches on, inexorably and only forward. Or so we thought until Einstein came along. His special and general theories of relativity changed the way we think about time forever, and believe it or not, their raw equations permit time travel. They even tell us how to do it. So let’s review the possibilities, and decide how possible they really are.

Why does it appear, that humanity is the lone intelligence in the universe? The answer might be that planet Earth is more unique than we've previously assumed. The rare earth hypothesis posits exactly this - that a range of factors made Earth exceptionally unusual and uniquely able to produce intelligent life.

Life exists in our universe. There we go - one hopefully uncontroversial statement. Therefore our universe is capable of producing and supporting life. How am I going? Two for two? Let’s try for three: therefore there are countless universes. Hmmm. Did I break my streak?

The moment you started observing reality, you hopelessly polluted any conclusions you might make about it. The anthropic principle guarantees that you are NOT seeing the universe in most typical state. But used correctly, this highly controversial idea can be extremely powerful. So, how do you correctly use the anthropic principle?

The universe is big, really, really big. Although according to a new paper, it may literally be infinitely smaller than we previously thought.

Since the dawn of humanity around 100 billion people have lived. How many will live in the future of our species? We might hope for a trillion times that if we colonize the galaxy. But a simple statistical argument tells us that the doom of our species is much, much closer.

What if every single black hole that formed in our universe sparked the big bang of a new universe? Cosmological natural selection proposes exactly this - but even better, it claims to be able to test the hypothesis.

Why is there something rather than nothing? Well the answer may be found in the weakest particle in the universe: the neutrino. For over half a century Fermilab has been the premier particle accelerator facility of the United States and we got to visit with Don Lincoln to explore it’s science and its engineering. These days many of the super-powered geniuses of Fermilab are tackling the mysteries of the neutrino. Why? Because this elusive particle may hold powerful secrets: from the unification of the forces of nature to the biggest question of all: why is there something rather than nothing?

Black holes are awesome - but how about black holes being captured by the screaming vortex of a quasar, where they merge and grow like some monstrous version of a solar system. This insane hypothesis is getting closer to reality, according to the papers in today’s space time journal club.

The three body problem is famous for being impossible to solve. But actually it's been solved many times, and in ingenious ways. Some of those solutions are incredibly useful, and some are incredibly bizarre.

In particle physics we try to understand reality by looking for smaller and smaller building blocks. But what if that has been the wrong philosophy all along?

If the universe goes on forever, does that mean there are infinite versions of you out there?

What does the strong nuclear force, the fundamental symmetries of nature, and a laundry detergent have in common? They’re all important parts of the tale of the axion - a tale whose end may take us beyond the standard model and solve one of the most vexing mysteries in astrophysics.

It’s not surprising that the profound weirdness of the quantum world has inspired some outlandish explanations - nor that these have strayed into the realm of what we might call mysticism. One particularly pervasive notion is the idea that consciousness can directly influence quantum systems - and so influence reality. Today we’re going to see where this idea comes from, and whether quantum theory really supports it.

Why is it that we can see these multiple histories play out on the quantum scale, and why do lose sight of them on our macroscopic scale? Many physicists believe that the answer lies in a process known as quantum decoherence.

If we can’t ever peer into these other realities that are used to explain quantum mechanics, how do we know they exist? In order to understand what happens to those different branches, and to understand why we find ourselves in one of them, we need to embrace one of the interpretations of quantum mechanics.

In quantum world things are routinely in multiple states at once - what we call a “superposition” of states. But in the classical world of large scales, things are either this or that. The famous thought experiment is Schrodinger’s cat - in which a cat is in an opaque box with a vial of deadly poison that’s released on the radioactive decay of an atom. Quantum mechanics tells us that the atom’s wavefunction can be in a superposition of states - simultaneously decayed or not decayed. So is the cat’s wavefunction also in a superposition of both dead and alive.

If there’s one thing cooler than a black hole it’s a rotating black hole. Why? Because we can use them as futuristic power generators, galactic-scale bombs, and portals to other universes.

Normal maps are useless inside black holes. At the event horizon - the ultimate point of no return as you approach a black hole - time and space themselves change their character. We need new coordinate systems to trace paths into the black hole interior. But the maps we draw using those coordinates reveal something unexpected - they don’t simply end inside the black hole, but continue beyond. In these maps, black holes become wormholes, and new universes lie on the other side.

In astronomy we talk about billions of years like it’s no big deal. But how can we be sure about timescales so far beyond the capacity for human intuition? Our discovery of what we now call deep time is very recent - as recent as our discovery of the true spatial vastness of our universe. And it came as scientists tried to measure the age of the Earth. What they found was as shocking and humbling as anything seen through the telescope.

The Milky Way galaxy is relatively calm by the destructive standards of the rest of the Universe, and compared to its own very violent past. But just recently we discovered that its violent past was much more recent than we thought - and could even happen again.

From Stargate to Interstellar, wormholes are our favorite method for traveling across fictional universes. But they are also a very serious field of study for some of our greatest minds over the last century. So what’s the holdup? When do we get to wormhole ourselves out of here?

In today's livestream you'll be able to Ask Matt O'Dowd, a PhD in astrophysics, anything. Tune in to ask your own question or see some of the great questions our audience has for Matt!

The universe is precisely 13.8 billion year old - or so our best scientific methods tell us. But how do you learn the age of the universe when there’s no trace left of its beginnings?

As the 19th century came to a close, physicists were feeling pretty satisfied with the state of their science. The great edifice of physical theory seemed complete. A few minor experiments remained to verify everything. Little did those physicists know that one of those experiments would bring the entire structure crashing down paving the way for the physics revolution of the 20th century.

This is a map of the multiverse. Or in physics-ese, it’s the maximally extended Penrose diagram of a Kerr spacetime. And in english: when you solve Einstein’s equations of general relativity for a rotating black hole, the universe does not come to an abrupt halt at the bottom of the gravitational pit. Instead, a path can be traced out again but you do not end up in the universe that you started in. Like I said, it’s a map of the multiverse.

It’s been 120 years since Henry Cavendish measured the gravitational constant with a pair of lead balls suspended by a wire. The fundamental nature of gravity still eludes our best minds - but those secrets may be revealed by turning back to the Cavendish experiment. That steampunk contraption may even reveal the existence of extra dimensions of space.

With the global pandemic of Covid 19 still encompassing the word, we are generally not big fans of viruses right now. But we sure are thinking about them a lot. That’s right, even astrophysicists are pondering these bizarre little critters. In fact, astrovirology, although very new, is actually an emerging subfield of astrobiology. And that’s because it turns out viruses don’t just influence organisms - they’re incredibly important on a planetary scale. Perhaps an interplanetary scale.

Conformal Cyclic Cosmology is a story of the origin and the end of our universe from great mathematical physicist Sir Roger Penrose. It’s goes like this: the infinitely far future, when the universe has expanded exponentially to to an unthinkably large size, and every black hole and particle has decayed into faint radiation .... that infinite stretch of space and time is identically the SAME THING as the infinitesimal and instantaneous big bang of a new universe, and our universe is just one in an endless chain.

Black holes are about the worst subjects for direct study in the universe. But at this stage, it’s all we can do to convince ourselves of their existence. Actually studying the physics of real black holes is much, much harder. I mean, we could try to make one - but that’s way beyond our current tech level, and also potentially humanity-destroying. Well it turns out we don’t need to make real black holes to at least get started with the lab work. We can instead study analog black holes - and by analog, I don’t mean old fashioned clockwork black holes - I mean analogies. Physical systems that aren’t black holes but that behave in similar ways - and may reveal the real behaviours of real black holes.

Black hole singularities break physics - fortunately, the universe seems to conspire to protect itself from their causality-destroying madness. At least, so says the cosmic censorship hypothesis. Only problem is many physicists think it might be wrong, and that naked singularities may exist after all.

The most precious substance in our universe is not gold, nor oil. It’s not even printer ink. It’s antimatter. But it’s worth every penny of it’s very high cost, because it may hold the answer to the question of why anything exists in our universe at all.

When we detected the very first gravitational wave, a new window was opened to the mysteries of the universe. We knew we’d see things previously thought impossible. And we just did - an object on the boundary between neutron stars and black holes, which promises to reveal the secrets of both.

ليس لدينا نظرة عامة مترجمة باللغة الإنجليزية. ساعدنا في توسيع قاعدة البيانات الخاصة بنا عن طريق إضافة واحدة.

In this 90 minute conversation we explore what Theories of Everything really are outside the hype, dig into the essential physics mysteries that compel us to search for one, and survey the major TOE contenders currently being explored by the physics community.

The second in our two event series about Theories of Everything! Watch the first one: https://www.youtube.com/watch?v=_izoc...

Please subscribe to Brian Keating's YouTube Channel to watch one-on-one interviews with the guest speakers and more: https://www.youtube.com/DrBrianKeating

Existing Theories of Everything have not yet produced experimental evidence that solves the fundamental challenges facing physics. That lack of progress has opened up a sea of controversy, from disagreements about the very necessity of TOEs, to questioning the cost/benefit of mega-billion dollar particle accelerators in search of them, to the emergence of competing TOEs from physicists outside of the academic community. In this 90 minute chat we dive into the existential questions around TOEs.

Special thanks to Brian Keating, Lee Smolin, Sabine Hossenfelder, and Eric Weinstein for helping us create this great event.

Our galaxy is full of dysfunctional stellar relationships. With more than half of all stars existing in binary orbits, it’s inevitable that many stellar remnants will end up in parasitic spirals with their partners. Today we’re going to look at the worst of these - from the novae produced by white dwarfs, to X-ray binaries created by neutron stars and black holes - and much weirder things besides.

If you wanna make an omelet you gotta break a few eggs. And by omelet I mean a theory of everything, and by eggs I mean a billion billion subatomic particles obliterated in the next generation of giant particle colliders.

Pin-pricks in the celestial sphere, through which shines the light of heaven? Or gods and heroes looking down from their constellations? Or lights kindled above middle earth by Varda Elbereth and brightened with the dew of the trees of Valinor? Science has long pondered the mysteries of the stars. This is how we finally figured them out.

The great physicist Hermann Weyl once said: "My work always tried to unite the true with the beautiful, but when I had to choose one or the other, I usually chose the beautiful." But is this actually good advice for doing physics?

One of the most bizarre proposals for life not as we know it doesn’t even use atoms. It proposes that fundamental kinks and defects in the fabric of the universe - cosmic strings beaded with magnetic monopoles - may evolve into complex structures, and even life, within stars. This idea was just published in Letters High Energy Physics Letters by physicists Luis Anchordoqui and Eugene Chudnovsky, and today on Space Time Journal Club we’re going to see how legit this actually is.