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How did the universe begin? How can something come from nothing? One way to “solve” this most difficult of philosophical ...

According to quantum physics, the universe should have collapsed on itself in the instant after the Big Bang due to all particles ...

The deaths of massive stars results in one of the most beautiful and violent events in the universe: the supernova. They are so ...

The universe is expanding and that expansion is accelerating under the power of dark energy and eventually all matter and ...

Our solar system is a tiny bubble of habitability suspended in a vast universe that mostly wants to kill us. In fact, a good fraction of ...

When we detected the very first gravitational wave, a new window was opened to the mysteries of the universe. We knew we'd ...

The Fine Structure Constant is one the strangest numbers in all of physics. It's the job of physicists to worry about numbers, but ...

We know that gravity must cause clocks to run slow on the basis of logical consistency. And we know that gravity DOES cause ...

One of the most bizarre proposals for life not as we know it doesn't even use atoms. It proposes that fundamental kinks and ...

We've traveled to lots of weird places on this show - from the interiors of black holes to the time before the big bang. But today I ...

Here's the story we like to tell about the beginning of the universe. Space is expanding evenly everywhere, but if you rewind that ...

What are… things? Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] ...

How many times can I half the distance between my hands? Assume perfect coordination and the ability to localize my palms to ...

Note: There is a correction in this video that has been addressed in the pinned comment below. You can further support us on ...

Neutron stars aren't dark matter--we figured that out a while ago. But new research is telling us that they may be dark matter ...

Superconductive materials seem miraculous. Their resistanceless flow of electricity has been exploited in some powerful ...

The speed of light is often cited as the fastest anything can travel in our universe. While this might be true, the speed of light is the ...

The device you're watching this video on is best understood by thinking about positive and negative charges moving around a ...

Soon after the Big Bang, the first generation of monstrously large stars ignited, lit up the universe, and then died. The resulting ...