Okay, going to Mars is going to be expensive. Not only that, but who we choose to pick on that trip also needs to have the statistically lowest chance of perishing. So it might be the case that our best scenario is all female crew!

Jay Walker, curator of the Library of Human Imagination, conducts a surprising show-and-tell session highlighting a few of the intriguing artifacts that backdropped the 2008 TED stage.

How did earth get the ingredients for life? A new discovery from Comet 67P might hold some answers. And learn where to find Mars in the night sky from 75 million kilometers away.

What was that giant swoop on Venus? And SpaceX continues to move forward.

If you look closely enough, you'll see the night sky is actually a little green. SciShow Space explains the science behind the phenomenon known as airglow.

Meet one of the newest celestial bodies to be discovered: rogue planets, worlds that hurtle around the galaxy without any parent star. Caitlin Hofmeister explains how we found them, and where we think they might have come from.

SciShow Space shares the latest news from the around the universe, including the first supernova observed in real time, and Internet service on the moon. Finally!

Caitlin serves up the latest in space-science news, this week featuring developments in missions dedicated to sampling asteroids, detecting exomoons, and solving the mysteries of the moon.

The Boomerang Nebula is colder than space! And it's not really shaped like a boomerang!

A monitoring system developed to listen for secret nuclear tests mostly hears other events happening all around Earth.

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In about 200 million years, Earth is due for another supercontinent. What exactly that supercontinent will look like, though, depends on a lot of geological factors, and is harder to guess at than you might think! Today, SciShow walks...

SciShow tackles a Quick Question with a longish answer: What causes auroras? TL;DR: It's a breathtaking display of particle physics in action.

When a piece of cryptography is described as having "256-bit security", what exactly does that mean? Just how big is the number 2^256?

Extreme weather sometimes happens in very specific areas thanks to extreme surface temperature differences.

Today Hank uses his patented prognosticating abilities to tell you about some space news events to watch out for in 2013.

What one thing is the Curiosity rover going to spend most of the year doing? Why are we going back to the...

Hank tells us about near-earth objects & primordial black holes; new developments in evolutionary genetics; a giant squid & a giant radio telescope; & answers viewer questions about disposing of nuclear waste in space.

There are some captivating things when you look up at the night sky, but our location in the Milky Way may be fogging up our view.

Astronomers have been trying to figure out black holes for hundreds of years, and newly published research may hold some big clues! Plus, rust isn’t supposed to happen in dry and airless places like the Moon. Could the elements that...

Energy is neither created nor destroyed - and yet the global demand for it continues to increase. But where does energy come from, and where does it go? Joshua M. Sneideman examines the many ways in which energy cycles through our...

Astrophysicist and TED Fellow Sarah Rugheimer searches for aliens -- but not the cartoony green kind. She's looking for extraterrestrial microbes by studying how these single-celled organisms emit gases, which could reveal evidence of...

All 12 days in ONE video!

Imagine an enormous, lush rainforest teeming with life...in the Arctic. Well there was a time -- and not too long ago -- when the world warmed more than any human has ever seen. (So far)

In this stunning slideshow, celebrated nature photographer Frans Lanting presents The LIFE Project, a poetic collection of photographs that tell the story of our planet, from its eruptive beginnings to its present diversity. Soundtrack...

With a recent announcement from the UN Office for Outer Space Affairs, the doors to space research have been opened for many new countries.