Hollywood (and other fictional media) loves to show people dying in outer space. And it has several go-to causes of death, on a sliding scale of accuracy. But it turns out, reality has some ways to kill you that are far stranger than...

In 2023, a team of researchers proposed that our universe experienced not one, but TWO Big Bangs about a month apart from one another. The first for the stuff described by our Standard Model of Particle Physics. And the second for that...

The universe is going to end. But of all the possible ends of the universe vacuum decay would have to be the most thorough - because it could totally rewrite the laws of physics. Today I hope to help you understand exactly how terrified...

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?

Imagine it: the observable...

What is Quintessence? Well we know that something is up with the way the universe is expanding - there’s some kind of anti-gravitational effect that’s causing the expansion to accelerate. We don’t know what it is - just that it competes...

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...

Sometimes our mathematical hacks point to strange new aspects of reality. For example Max Planck used a quantization trick to figure out the spectrum of light emitted by hot objects. The quantization part of his math trick was meant to...

Air. I bet you never even notice that it’s there. Yet you are swimming in an ocean of it every day. If there’s a literal ton of air pressing down on you all the time, so why don’t we feel it? We look back at the history of physics to...

Ever since we started launching stuff into space, we've communicated with spacecraft (and astronauts) using radio waves. But over the past few decades, scientists have experimented with a new technique that could make things a lot more...

Where would biology be without microscopes? But for a long time, in order to see the smallest bits of life, that life had to be dead. Then along came Atomic Force Microscopy, which let us observe things like DNA and proteins moving...

Deep in a Sardinian mine, researchers are constructing an experiment that hopes to solve what's known as The Worst Prediction In The History of Physics, and pin down the true identity of dark energy.

Michael Aranda explains the nuts and bolts of Hyperloop, the new magnet-driven, solar-powered transit system proposed by Spacex genius Elon Musk. Learn how Musk answered three vexing questions to create the transportation of the future...

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

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

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

Last week, the recipients of the 2017 Nobel Prizes were announced. We take a closer look at the winners of the Physiology and Chemistry Awards, whose breakthroughs change the way we study sleep, and allow us to look at microscopic...

Hank answers a SciShow viewer's most pressing question about what happens if the human body gets exposed to space. Would your head really explode?

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

When astronauts go into space, they're not always going alone.

Long before we had rocket scientists, the idea of spaceflight traveled from mind to mind across generations. With great visuals, TED Fellow and NASA economist Alexander MacDonald shows how 300 years of sci-fi tales -- from Edgar Allan...

Learn about the strongest, slowest, and fastest science in 2015!

Hank gives it to you straight about "anti-gravity technology" -- basically, it doesn't exist. But if you really want to hover, you have options!

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.

Humans have been talking about space colonization for quite some time, but our neighboring planets are not exactly the most hospitable places. If we are ever going to be successful, we should probably figure out where we could reasonably...