Squeaks is heading on a trip around the world! He's going to see so much, and wants Jessi to experience those sights, too. In this episode, he learns about how humans (and a couple of other animal guests) see.

Fluorescence isn't just a cool effect that turns your white T-shirt neon purple under a black light. Its discovery opened our eyes to a whole new field of science and engineering. And it's all thanks to a crystal called fluorite....

In this episode of Crash Course Biology, we’ll learn about the ways population genetics reveals how groups of living things evolve—by comparing genetic similarities and differences. We’ll discover the most genetically diverse species of...

It’s common knowledge that you should never look directly at the sun. But, like, what about during an eclipse? Surely you can look then?

Astronomers have found more than 5,000 planets in the last three decades, but that’s not nearly as exciting as potentially coming across the first extraterrestrial creatures. And we may finally be in a position to make that discovery.

Everyone makes mistakes, but misidentifying a species more than 100 times? It happened. In this List Show, we tell the tale of the periwinkle snail and other creatures scientists confused for someone else. <br/>

According to the Skin Cancer Foundation, everyone older than six months should use sunscreen every day to decrease the risk of skin cancer. But today’s sunblock is full of ingredients that are decades old and increasingly obsolete. Dr....

Atomic clocks are the best timekeepers humanity's got these days, but scientists are working toward something even better: a SUB-atomic (aka nuclear) clock.

We know that not everyone's vision is perfect, which is why some of us need glasses. But some people can also just see more stuff than others! From seeing UV and infrared light, to even having bonus color receptors in our eyes, there are...

If you're lucky enough to find a glowing rock, it likely doesn't mean you're the chosen one. In fact, it could have to do with one of these five phenomena! Learn about the quantum mechanics of glowing rocks in this new SciShow Episode...

Lots of life on Earth can fluoresce, creating a beautiful neon world of camouflage, communication, and adaptation that is hidden from the human eye.

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

Of all the weird animals that exist in the world, platypuses are up there with the weirdest, and last year scientists discovered something even more peculiar about their fur: it glows! What may be even more strange, though, is how little...

From menstrual cycles to rainfall, there are lots of claims about the moon's influence. In today's episode, Hank is here to set the record straight with 8 myths & facts about our moon.

Going out in the sun can work wonders for your mood, but unfortunately too much UV exposure can do serious damage to your DNA. This damage occurs through a type of organic reaction called a pericyclic reaction. In this episode of Crash...

Chlorofluorocarbons, or CFCs, seemed too good to be true when they were first created, and before long astronomers studying Venus' atmosphere discovered what could go wrong with this "miracle molecule."

The Astrophysics Pioneers program is funding four innovative new missions that read like a best-hits album of the most exciting astronomical frontiers: from galaxy evolution and exoplanets, to neutron star mergers and astroparticle physics.

Furanocoumarins, the evolutionary weapons of certain plants (including limes), can ruin your vacation, or cause caterpillars to curl leaves. Find out why in this episode of SciShow!

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

With so many claims about the moon’s influence over everything from menstrual cycles to rainfall, SciShow is here to set the record straight with these 8 truths and myths about our moon.

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Fluorescent molecules are useful for a lot more than just making you look cool at your local rave. Fluorescence turns out to be a kind of chemical superpower that lets us tackle all kinds of problems, from solving crimes to saving lives!

The apparent void in the darkness of space is not as empty as you might think. In fact, it somehow holds the key to creating stars, planets, and even us! And Dutch super-scientist Ewine van Dishoeck made it her life's work to figure out...

Hank explains why scientists spend so much time and brain power making animals that glow. Well, the first thing is, they don't really glow. And the second thing is: Scientists are just like the rest of us in that they don't believe some...

If you've ever spent too much time in the sun and forgotten to put on sunscreen, you know how painful a sunburn can be. But for some animals, forgetting the sunscreen wouldn't be a problem because they can just produce their own!