The oldest rocks on Earth are more than just ancient—they’re time machines, holding clues to Earth’s missing history and revealing what happened in the unknown times after the Big Bang. We’ll work with our Adam and Joss from Howtown to...

No, technically Earth doesn't orbit the Sun. Yes, technically sound can travel through space. Over the years we've built up a lot of myths and misconceptions about astronomy. But of course some are more flat-out false than...

In the mid-1990s, a meteorite with the unmemorable name ALH84001 became the most famous rock in the world. Because one team of scientists proposed that it had the evidence of real, if microscopic, Martians.



Hosted by: Reid...

"Water, water, every where"...or so that one poem goes. And it's kinda right, because there's way more water INSIDE the Earth than on the surface. But scientists still don't know with certainty exactly how Earth got all of that...

This is a love letter to water, life’s solvent, and one of the most wonderful molecules around. In this episode of Crash Course Biology, we’ll learn about how water’s polarity and hydrogen bonding help it sustain life on a larger scale....

The Moon is typically 380,000-ish kilometers from the Earth, so it doesn't seem like they have that much of a direct influence on one another. However, the presence of hematite on the lunar surface suggests our planet is causing the Moon...

In this episode, Jessi and her friends at The Fort learn about the physics behind all the slippery fun you can have on the ice. <br/>

In this SciShow Kids compilation, Jessi and Squeaks have a wonderful winter time learning the science of ice skating, why peppermint tastes so chilly, and how to build a gingerbread Fort!

If you rank the most habitable places in our solar system Venus lands pretty low, with surface temperatures hot enough to melt lead and sulphuric acid rain. And yet it may have just jumped to the front of the pack. In fact, we may have...

Half of the universe is filled with expansionist alien civilizations, and it’s only a matter of time before they’ll reach us. OK, that sounded a little sensationalist. But it’s also the conclusion of a recent astrophysics paper. Let’s...

Otherwise landed in 2004 with its twin - MER-A, better known as Spirit. These six-wheeled golf-cart-sized robots were Swiss army knives of geological lab instruments. Opportunities most spectacular discovery where these cute little...

We already have the technology to bring humans safely to Mars and set up small settlements - or at least could do within a generation. But those settlements will need to be cocooned - shielded against the deadly cold, intense radiation,...

Mercury, Venus, and Mars are all super low on water – so where did ours come from and why do we have so much of it? We think our water came from a few unlikely sources: meteorites, space dust, and even the sun.

While Earth’s natural history has been playing out over the last few billion years, another epic planetary saga has also been unfolding right next door.

I’m guessing you’re pretty familiar with ice. We use it in our drinks, slip on it, skate on it, worry about climate change melting it. But have you ever stopped to really think about this stuff? The freezing and melting of water affects...

If we lived light years from Earth, how would we know there’s life here? Let’s take a look at the search for extraterrestrial life on habitable exoplanets, and discover what biosignatures would show someone else that we’re here.

There’s one rule on Space Time: It’s never Aliens. But every rule has an exception and this rule is no exception because: It’s never aliens, until it is. So is it aliens yet? And on today’s Space Time we’re going to examine all the best...

One Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in one minute!

Winning an alpine skiing race can come down to a tiny margin, so the skiers have to make sure they prepare their skis just right!

Scientists have discovered an underground lake of liquid water on Mars! While this isn’t itself evidence for life on Mars, it does raise some new possibilities.

Water is one of the most abundant and important substances on Earth, so you think we'd know everything there is to know about it. Turns out, water is so much stranger and more complex than we ever thought! Join Olivia Gordon for a new...

Squeaks is back from visiting Sam the Bat’s cave and is excited to learn all about how different caves form and why they look the ways they do!

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...

We here at SciShow compiled a list of videos based on popular requests. Hank Green hosts with this winter themed episode!