Mountains may look like they've all been stagnant for thousands of years, but the life cycle of a mountain is actually quite fascinating. From mountain ranges in space, to why Earth isn’t a water-world, here are some videos exploring the...

So what exactly do magnetic fields actually do? What would happen if they went away? Turns out, it could be catastrophic! SciShow will explain it all in this fun new episode hosted by Michael Aranda!

We’ve sent thousands of things into space over the years! Many of them just orbit the Earth, and some are flying out past the edges of the Solar System. In this episode, we present our favorite currently active space probes!

While there is a little wiggle room, the planets in our solar system really are orbiting on mostly the same level. Why do they do that?

Modern life runs on wireless technology. What if the energy powering our devices could also be transmitted without wires? Electrical engineer Ali Hajimiri explains the principles behind wireless energy transfer and shares his far-out...

If you were looking down at the Earth from space, what would you be able to see? Do you think you would be able to see your house? What if you were super far away?

This week, Mister Brown joins Squeaks to answer a bunch more of your questions about the Earth and about our bodies!

What are the planets outside our solar system like? Astrophysicist and TED Fellow Jessie Christiansen has helped find thousands of them (and counting), and the variety is more wonderful and wild than you might imagine. She shares details...

From favorite moons to the search for alien life, astronomer Heidi Hammel discusses the latest in astronomy and the breakthrough innovations behind her work with NASA's James Webb Space Telescope. In conversation with science journalist...

In 2009, researchers ran a simple experiment. They took everything we know about our solar system and calculated where every planet would be up to 5 billion years in the future. They ran over 2,000 simulations, and the astonishing...

Earth’s magnetic field is special! And, in the last 20 years, we’ve made incredible discoveries, thanks to a squad of probes that have flown around our planet, observing solar wind as a team!

In which John Green, Hank Green, and Emily Graslie teach you about what happened in the Universe after the big bang. They'll teach you about cosmic background radiation, how a bunch of hydrogen and helium turned into stars, formed...

The James Webb Space Telescope has launched! But it was a very long road to get to this point, and we’ve been following the progress for a decade!

In 1990, an experiment conceived by Carl Sagan was performed using using the Galileo spacecraft. The purpose? To detect life on a planet based on measurements by a space probe. The experiment was successful, and abundant life was...

How do we find planets -- even habitable planets -- around other stars? By looking for tiny dimming as a planet passes in front of its sun, TED Fellow Lucianne Walkowicz and the Kepler mission have found some 1,200 potential new...

Why is the Solar System Flat?

Early telegraph operators and WWI spies picked up some weird noises on radio waves. As it turned out, they were actually listening to plasma waves in Earth’s magnetic field lines!

Do other planets have weather? It turns out that, yes, they do! But, the weather isn't all the same on other planets because of things like atmosphere. In this episode of Crash Course Kids, Sabrina takes us on a tour of the weather on...

What do astronomers look for when they study exoplanets for signs of alien life? Hank explains how space telescopes are already yielding tantalizing clues of what other worlds might hold -- including water! -- and how the next generation...

In which John Green, Hank Green, and Emily Graslie teach you about what happened in the Universe after the big bang. They'll teach you about cosmic background radiation, how a bunch of hydrogen and helium turned into stars, formed...

Pulsed plasma thrusters use the same stuff that’s on your frying pan to make spacecraft zoom around the universe. And they’ve been doing it since the 1960s.

Scientists have been searching for alien life by honing in on the existence of liquid water, but we might be overlooking some types of life out there that doesn't need water at all.

Scientists studying Comets 67P and Lovejoy have discovered oxygen, alcohol, and the building block of sugar. Sounds like a regular Friday night on earth, but it’s the first time we’ve found any of these things on a comet.

The way modern researchers study the sky hasn’t really changed in the last few centuries. For the most part, astronomers still study things by analyzing their light.