In the animal kingdom, sleeping can be dangerous. Lying completely motionless and unconscious for hours at a time is just asking for trouble. There are, however, some sleepy risk-takers who spend almost all of their days snoozing.

This year's end News episode wraps up with nothing but superlatives: the biggest, oldest, first, last, smallest and hottest developments in science from 2012.

Dinosaurs were huge—it's common knowledge. So why aren't modern mammals anywhere near that size? In this episode of SciShow, Hank gives a quick run-down of the reasons scientists think the land mammals of today are nowhere near the size...

Fossils can provide clues to the conditions that ancient species lived in, like what their environments felt like, how deep in the water some species lived, or even how long the Sun was out!

We know these glaciers are already on the way out, so we need to find out whether we can bulk them back up again. For that, we turn to the glaciers’ past – and a lot of penguin bones.

Fossils aren't just something you find at dig sites. Correction: 3:03 Actually, it was the American Museum of Natural History. But it was a Bruce Museum curator who found it!

Scientists dissect the human scream for the first time, and also re-think what was thought to be the biggest dinosaur in the world.

According to the fossils we've found, it turns out the T-Rex may look different than what we thought! Join Hank Green for a fascinating dive into the past, and a realistic look at what the King of the Dinosaurs was actually like. Let's...

This week in news, a discovery in genetics that was once thought unbelievable, and a parrot so large that it shakes up what we know about avian evolution.

For a long time, we could only guess what color a dinosaur might be. But in the past decade, there has been an explosion of color.

We traveled to Bozeman, Montana to meet with Dr. Ellen-Therese Lamm who explores ancient life by studying it at the cellular level. Kallie and Dr. Lamm discuss how she does this, and what she's learned by putting dinosaur bones under a...

Recent proof-of-concept studies showed that researchers were able to survey animals in an area simply by vacuuming up DNA in the air.

SciShow News shares two amazing things from the deep past that have been discovered: a new ancient human relative, and a 30,000-year-old giant virus.

Prevailing for around 270 million years and encompassing more than 20,000 distinct species, trilobites are some of the most successful lifeforms in Earth's history. When they sprung into existence, they were among the most diverse and...

SciShow News shares new research into how music festivals can lead to high levels of drugs in your drinking water, and celebrates the man who created the world’s first geological map.

This week, a group of scientists estimated the cost of saving just one small village in America’s Chesapeake Bay from rising sea levels, and another found evidence that Smilodon (aka the saber-toothed cat) actually helped take care of...

Today, penguins are found mainly in the Southern Hemisphere. But fossils have revealed giant lookalikes to these swimming birds further up north, spurring questions of how they evolved and what happened to them.

The Bone Wars resulted in the description of some of the most famous dinosaurs we know of today, but not without some pretty big mistakes.

Once evolution finds a trick that works, it tends to repeat it. Here are a few examples of prehistoric animals that look a lot like ones we know today.

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Today, bones hold us up. But for ancient jawless fishes, bones may have been a way to store energy for long journeys. Plus, new research indicated that hippos and cetaceans may have evolved their aquatic traits separately.

SciShow News introduces you to the most massive land animal ever to walk the earth (pretty much) and tells you what’s going on with all of these earthquakes lately.

Among the dinosaurs, giant sea dragons roamed the ancient ocean. Millions of years later, paleontologist Dean R. Lomax and his team freed the remains of one of these colossal creatures from the Earth. Settle in to learn about the...

Dinosaurs were social animals, moving in herds, hunting in packs, but could they dance?

A new study calls the claims of fossilized brains into question, and another finds ichthyosaurs might have been bigger than our current champions, the blue whales.