This ancient species had the same six legs and segmented body that we’d recognize from an ant today. But it also had a huge, scythe-like jaw and a horn coming out of its head. This bizarre predator belonged to a group known as “hell...

In a rich conversation full of practical insights, former Prime Minister of Australia Julia Gillard and former Finance Minister of Nigeria Ngozi Okonjo-Iweala reflect on their experiences as women leaders in positions of global power --...

Today Hank gains insight from that most philosophical of figures...Leonardo DiCaprio. In this episode, we’re talking about the process of philosophical discovery and questioning the relationship between appearance and reality by taking a...

Trilobites are famous not just because they were so beautifully functional, or because they happened to preserve so well. They're known the world over because they were everywhere!

With all the CGI cat-humans going around on the internet these days, it’s hard to deny the sense of yikes known as the uncanny valley. But what exactly is this phenomenon, and why do we feel it when we do?

I noticed something weird about Disney Princesses lately. Naturally, I had to examine it through the lens of science. The answer led me to new knowledge about human development, the domestication and taming of animals, and why we find...

Since their emergence over 200,000 years ago, modern humans have established communities all over the planet. But they didn't do it alone. Whatever corner of the globe you find humans in today, you're likely to find another species as...

Maxillofacial surgeon Iain Hutchison works with people whose faces have been severely disfigured. By pushing to improve surgical techniques, he helps to improve their lives; and by commissioning their portraits, he celebrates their...

Why do we sleep at night instead of during the day? In this episode of SciShow Hank talks about circadian rhythms, how they work, and how they regulate different processes in our bodies.

Lots of animals can change the color of their skin, but there's nothing quite like the chameleon sand tilefish, which can change its appearance in an instant and flash the colors of the rainbow.

For decades, one of the most abundant kinds of fossils on Earth, numbering in the millions of specimens, was a mystery to paleontologists. But geologists discovered that these mysterious fossils could basically be used to tell time in...

In this video Paul Andersen explains how variation is created in a population over time. Variation in offspring is caused by genetic recombination, mutations and environmental effects. Parental DNA is recombined using the process of...

Almost everyone has a scar that tells a story, but have you ever wondered why exactly scars form in the first place?

Changing colors -- it’s not just for chameleons! Many species of octopuses, squid and cuttlefish can do it, as well as a few insects, and even mammals and birds. Find out what feats of biology different animals use to change their...

Cheyenne Cochrane explores the role that hair texture has played in the history of being black in America -- from the heat straightening products of the post-Civil War era to the thousands of women today who have decided to stop chasing...

Hank gets to the more violent part of community ecology by describing predation and the many ways prey organisms have developed to avoid it.

This week, we're starting our discussion of Mythical Creatures with the WORST creatures. Monsters. What makes a monster monstrous though? Mike Rugnetta will guide you through the fine line between a magical creature and a monster....

Paul Andersen explains how natural selection is a major mechanism in evolution. The video begins with a discussion of Charles Darwin and the details of natural selection. The data of the peppered moth during the industrial revolution...

Why do vampires shift from terrifying to seductive and back again? Let's explore the long history of the vampire’s transformation—from monstrous fiend to gothic heartthrob—and what it says about our fears, desires, and identity. Sexy…...

Joel Ward unveils FA Cup to Selhurst Park following final home appearanceWill Castle/ The Independent

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Howcast - Find out if working out will get rid of cellulite from personal trainer Mindi Smith in this Howcast sexy legs workout video.

Howcast - Learn how deep tissue massage can affect weight loss from celebrity massage therapist Meagan Holub in this Howcast video.

Howcast - Learn how deep tissue massage can break up cellulite from celebrity massage therapist Meagan Holub in this Howcast video.