Bats sleep upside down, so how come they don't fall? Turns out that they've got some unusual legs.

With the analysis of seven hominin fossils discovered in 2014, researchers are now adding another piece to the human evolution puzzle. Also in this episode: we add a new face to the SciShow team!

Jessi and Squeaks want to learn about what (and how) owls eat! Time to experiment!

Hank talks about some of the structures in our bodies that are "leftover" from previous evolutionary phases of humanity.

Katherine is back with more information about cats and Jessi from Animal Wonders shares Gonzo the crimson-rumped toucanet.

You think your tummy rumbles? Meet the ghost crab — it growls using teeth inside its stomach, and not because it’s feeling peckish!

Probably twice the size of a modern gorilla, Gigantopithecus is the greatest great-ape that ever was. And for us fellow primates, there are some lessons to be learned in how it lived, and why it disappeared.

Hank explains the scientific reasons behind why we humans generally prefer to eat donut hamburgers to carrots.

By giving some fossils a dental exam, we've learned more about how tusks first evolved. And humans aren't the only primate that can get down at karaoke night.

All animals have adaptations that help them survive in the wild...some just focus more on back-end development than others. Whether for offense, defense, or both, here are five creatures with butt-kicking behinds!

Sharks have been celebrated as powerful gods by some native cultures. And today, sharks are recognized as apex predators of the world's ocean. What is it that makes these fish worthy of our ancient legends and so successful in the seas?...

Learn some curious facts about the majestic manatee.

Where did turtles come from? And how did the they get their shells? The answers to these questions would eventually cause scientists to rethink the entire history of reptile evolution.

Erica Woodahl tells us how individual genetic screenings could help doctors prescribe better medications and Jessi from Animal Wonders brings in two fantastic rodents: Huckleberry the beaver and Chili Pepper the Patagonian cavy. Chapters...

Before she left for Chicago, Emily Graslie of The Brain Scoop sat down with Hank to discuss one of her favorite skulls from the from the Philip L. Wright Zoological Museum. Then Jessi Knudsen Castañeda from Animal Wonders joined in with...

Sharks wouldn’t be known for their fierce teeth today if it weren’t for their ancient scales.

Scientists were able to get molecular information from 1.7 million years old teeth using a new method that could completely change how we study extinct organisms.

Hank and Katherine talk about the wild cat known variously as a puma, mountain lion, cougar, panther and catamount and then Jessi from Animal Wonders brings a special animal guest to visit.

Today on the SciShow talk show, Emily fails to stump Hank with a new animal skull, and then Jessi from Animal Wonders shares Lokita the Chinese water dragon.

Seventeenth-century Danish geologist Nicolas Steno earned his chops at a young age, studying cadavers and drawing anatomic connections between species. Steno made outsized contributions to the field of geology, influencing Charles Lyell,...

Emily Graslie of The Brain Scoop is back again to stump Hank and to tell us about some fascinating new research in the field of rat telepathy (NO JOKE). Then Jessi from Animal Wonders shares Zoe the Red-lored Amazon parrot.

Some fish will never win any beauty pageants, but they still deserve our admiration, respect, and love, especially since their “ugly” traits are actually incredible examples of evolutionary innovation.

As we move through the world, we have an innate sense of how things feel -- the sensations they produce on our skin and how our bodies orient to them. Can technology leverage this? In this fun, fascinating TED-Ed lesson, learn about the...

You can probably tell someone the purpose of most of your body parts. But what about earwax? Or your appendix? If you’re looking for those answers, or wondering why you have a butt, pop a squat to find out about weird human attributes.