At the beginning of the 20th century, many scientists thought that we had learned all there was to know about physics. The problem is, the better we get at measuring things and building models of our universe, the more we discover that...

This video is about two-photon (gamma-gamma) physics, and how photons can interact with each other - either mediated by a passing lepton, or gravitationally via lensing, or via vacuum fluctuation...

Renewable energy may be the way of the future, but in order to store that energy to make our grids more sustainable, we might need to take a look back at some battery technologies of the past.

According to the cosmological principle, the universe is more or less the same in all directions. But what happens when we put this to the test?

The universe began in a Big Bang nearly fourteen billion years ago, and has been expanding ever since. But how does the universe expand and what is it expanding into? Sajan Saini explains the existing theories around the Big Bang and...

In this video Paul Andersen explains why astronauts are weightless. He also explains how Newton's Universal Law of Gravitation can be used to calculate the gravitational force between objects.

Dark Energy is what we call the mysterious force that seems to be pushing the universe apart. By some calculations, it makes up 70% of everything in nature. Or...maybe it doesn’t exist at all! Plus, Juno’s observations give us new...

The star-mapping satellite Gaia has found more than 20 stars speeding across the Milky Way toward intergalactic space. There are just a few things that can slingshot a star out of a galaxy and all of them take some extreme gravitational...

What do raindrops look like? Exactly how we drew them as kids, right? Wrong! Teardrop-shaped rain is physically impossible. This week I went inside a vertical wind tunnel to bring you the true shape of rain.

What weird worlds are these video games creating?

Crash Course Big History is back! It turns out, we couldn't tell all of the 13.8 billion years of the history of the universe in 10 Crash Course Episodes. So, Big History host Emily Graslie has returned to add 6 more episodes that look...

Hank responds to viewer questions, and explains what the Higgs boson particle actually IS.

Sending rockets into space requires sacrificing expensive equipment, burning massive amounts of fuel, and risking potential catastrophe. So in the space race of the 21st century, some engineers are abandoning rockets for something more...

We’ve developed thousands of technologies for space exploration, but luckily for us, sometimes those solutions apply to problems here on the ground, too.

Some of the oldest galaxies we’ve ever seen are small, faint satellite galaxies orbiting the Milky Way, and they're providing us with a glimpse of how the universe evolved.

Scientists have found fossils that show life appearing on Earth much earlier than we thought. Meanwhile, could there be a new fundamental force?

The insides of the our gas giant friend, Saturn, might be less of a mystery now that we’ve figured out how to use its rings to indicate its internal makeup. And the light emitted from some very old, very hungry black holes could be...

Scientists can’t directly observe dark matter, and they still don’t know what it is… so why are they so confident it exists?

On this Space Time Journal Club we look at how gravitational waves can be used to search for extra dimensions of space!

The sun shapes the solar system in many ways, including through its mysterious solar wind, which was thought to be pushed through the force of the sun’s electric field. Recent observations revealed, though, that that hypothesis may not...

You know nothing.

In space we can finally get away from pesky flies landing in our drinks! But before we can live off-Earth full time, sending flies into orbit is helping us study how space affects our human hearts and immune systems.

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...

SciShow Space shares the latest news from around the universe, including new insights into the giant supercluster of galaxies that we call home, and the first "data baby" from Rosetta's rendezvous with a comet.