Plenty of animal eyes "glow" in the dark, but only one species has eyes that change color with the seasons.

The animal kingdom boasts an incredible diversity of eyes. Some rotate independently while others have squiggly-shaped pupils. Some have protective lids, others squirt blood. But which creature has the best sight? Which sees best in the...

Today Hank and Sam figure out if medical side effects could help you "do crimes" and whether you can have a "gentle hate."

Plenty of animal eyes "glow" in the dark, but only one species has eyes that change color with the seasons.

Hank goes head-to-head with Minute Physics’ Henry Reich to test their wits about the winter solstice, reindeer, and the science of snow! Chapters View all HANK GREEN 0:20 HENRY REICH 0:28 MAX LOUTZENHEISER 1:03 FLORIAN STINGLMAYR 1:06...

Humans have been processing plants for their narcotic effects for at least 5000 years, historically for ceremonial purposes, to deal with harsh environmental conditions or difficult situations, and sometimes even to supplement...

Science probably isn’t the first thing that pops into your head when you think about Alaska, but it has a lot to offer when it comes to learning about the world, from cold corals to our behavior.

There are some seriously impressive journeys that animals will undertake to avoid the cold, to give birth, or to find food. All kinds of creatures migrate that you might not think about; some big and familiar, and others so...

Happy Holidays! Ever wonder how Santa could possibly manage to deliver all those presents in a single night? Or what gives red-nosed reindeer the ability to fly? And why do your Christmas lights get tangled in knots no matter how...

Reindeer meat could’ve entered North American cuisine and culture, but our turn of the century efforts to develop a reindeer industry were stymied by nature, the beef lobby, and the...

It's the battle of the SciShow Psych Hosts: Brit Garner and Hank Green! Brit came prepared, but can Hank still win the game for his Patron?

Bitcoin and other blockchain technologies, like NFTs, work a lot like reindeer mating.

In this collection of classic MinuteEarth videos, we examine the weird world of what we like to eat.

It's getting really cold where Jessi and Squeaks live, and that has her thinking about a super cool animal that's always ready for super cold weather: Reindeer!

Many animals use the same five senses as we do, but these creatures take that beyond the next level.

I'm sure you've heard of Isaac Newton and maybe of some of his laws. Like, that thing about "equal and opposite reactions" and such. But what do his laws mean? And how do they help us understand the world around us? In this episode of...

Everyone could use a few more smiles in their daily lives…and watching a funny video will often do the trick! OnlyGood TV videos help make your life fun, more manageable, happy and stress free!



Christmas is...

Aside from the pile of gifts under the tree, how can you really tell if Santa came while you were asleep? Here are some traps you can set and clues to look for.

It's Reindeer Enrichment day at the San Diego Zoo.

Watch the newest member of San Diego Zoo's reindeer herd explore the exhibit with mom.

Watch the newest member of San Diego Zoo's reindeer herd explore the exhibit with mom.

Watch the newest member of San Diego Zoo's reindeer herd explore the exhibit with mom.

Watch the newest member of San Diego Zoo's reindeer herd explore the exhibit with mom.

Watch the newest member of San Diego Zoo's reindeer herd explore the exhibit with mom.