PBS Member Stations rely on viewers like you. To support your local station, go to
href='http://to.pbs
.
or
g
/
DonateSPACE' target='_blank' rel='nofollow'>to
↓ More info below ↓<announcements!r/>

Sign up for the...

PBS Member Stations rely on viewers like you. To support your local station, go <a href='http://to.pbs.org/DonateSPACE' target='_blank' re<br/>l='nofollow'>to</a> href='http://to.pbs.org/DonateSPACE' target='_blank' rel='nofollow'>to
↓ More info below ↓

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...

Neutrinos are one of the most bizarre of known particles. Black holes are probably the most bizarre of astrophysical objects. Makes sense we should use one to study the other, no? Well, today we’re doing just that.<br/>

How far can you follow a compass needle? As far as the north magnetic pole, where the needle starts spinning wildly? Compass needles align with magnetic field lines, and on the precise spot of magnetic north, those field lines are...

Today we’re going to delve into a couple of the most famous paradoxes of special relativity: the Twin Paradox, The Ladder Paradox (aka the Barn-Pole Paradox), and a paradox suggested by our very own viewers, which asks whether a...

Fact: in a black hole, all of the mass is concentrated at the singularity at the very center. Fact: every black hole singularity is surrounded by an event horizon. Nothing can escape from within the event horizon unless it can travel...

If you used every particle in the observable universe to do a full quantum simulation, how big would that simulation be? At best a large molecule. That’s how insanely information dense the quantum wavefunction really is. And yet we...

From the astonishing evolutionary advances of the Cambrian explosion to our present-day computing revolution, the trend of dramatic growth after periods of stability can be explained through the theory of the "adjacent possible," says...

Ah, spring. As Demeter, Goddess of the Harvest, it's your favorite season. Humans and animals look to you to balance the bounty of the natural world which, like any self-respecting Goddess, you do with a pair of magical dice. But then,...

You and the professor have driven your DeLorean back to the past to fix issues with the spacetime continuum caused by your time traveling. But another DeLorean appears with older versions of you and the professor. The professors panic...

What shape is the event horizon of a black hole? Well, the answer to that question changes if our universe is hiding an extra dimension (or more). Black holes could come in an infinite number of shapes — including a precisely spinning...

Sometimes, you ask ChatGPT to do a math problem that an arithmetically-inclined grade schooler can do with ease. And sometimes, ChatGPT can confidently state the wrong answer. It's all due to its nature as a large language model, and...

In this episode, we discuss the basic nature of gravity, one of the four fundamental forces in our universe.

What if, no matter how strong your password was, a hacker could crack it just as easily as you can type it? In fact, what if all sorts of puzzles we thought were hard turned out to be easy? Mathematicians call this problem P vs. NP, it...

Hank introduces us to the most beautiful numbers in nature - the Fibonacci sequence.

Did you know that dogs can tell when you're stressed out? But how do they know? Turns out they can smell it! Join Hank for a new episode of SciShow and learn all about it! Hosted by: Hank Green (he/him)

It may produce creepy images with way too many dogs and eyeballs, but Google’s DeepDream program is actually a valuable window into artificial intelligence.