As a scientific concept, evolution was revolutionary when it was first introduced. With the help of all three of our hosts and the Smithsonian National Museum of Natural History’s new Deep Time Hall, we’ll try to explain how evolution...

Perhaps for plants in times of great stress and ecological upheaval, the more DNA the better.

The Wrangel Island mammoths would end up being the final survivors of a once-widespread genus. In their final years, after having thrived in many parts of the world for millions of years, the very last mammoths that ever lived...

How did seahorses — one of the ocean’s worst swimmers — spread around the globe? And where did they come from in the first place?

In almost every animal species on Earth, equal numbers of males and females are conceived. Why is that? Especially in populations like lions or elephant seals, where most males don’t get to mate? That’s survival of the laziest, not...

Why does sex exist? You might think the obvious answer is “reproduction” but there are plenty of organisms on Earth that don’t require sex to reproduce. And the more that scientists examined sex, they more they realized that it’s an...

Could humans ever evolve to have wings? Why don’t fish have propellers? Why don’t tigers have wheels? Why don’t zebras have laser turrets? These might all seem like stupid questions (and maybe they are!) but they can teach us a lot about...

Ever feel like you aren't totally yourself? Well, maybe you aren't. In this video, we explore the idea of human chimeras. In mythology, the "Chimaera" was a beast made from different animals combined into one. But in biology, a chimera...

We hear all the time about the ways that climate change could disrupt the world. But thanks to a quirk of reptile biology called temperature-based sex determination, it could also mean a surge in the numbers of female reptiles.

Explore how to solve Punnett squares that involve sex-linked traits, specifically focusing on X-linked traits. Video has a resource available hereref='https://www.amoebasisters.com/handouts' target='_blank' rel='nofollow'>here This...

Chromosome shenanigans have resulted in some unexpected hybrid fishes. Also, this record-breaking mouse lives at a ridiculous altitude.

The little fish Danio rerio holds secrets to understanding how vertebrates develop, how diseases like cancer work, and how we might one day learn how to regenerate human heart tissue.

It's the year 2018, and we now know that flies like to ejaculate. But how does this tie into our understanding of addiction?

Big-brained scientists have found the mechanism that may have allowed their brains (and all humans') to get so big.

What happens when a species is the only of its kind? This phenomenon is called a monospecific taxon. Studying these special species can help us better understand not just those sparse groups, but all life on this planet! Join Olivia...

Hank brings us breaking news from a team of geneticists working on figuring out what all that "junk DNA" in the human genome really is - turns out it's not junk after all.

From A positive to O negative, everyone's born with a blood type, and they're stuck with that blood type for their whole lives... or are they?

Scientists know that genetic factors can explain many of autism’s features - but have autism researchers been looking for those features in the wrong DNA? A new study uses A.I. to uncover changes linked to autism in the stretches of non...

Brit Garner, host of SciShow Psych, talks about the research she's doing in conservation genetics/genomics, and Jessi from Animal Wonders shows off an African crested porcupine!

High elevations can be a problem for humans. Since the air is thinner, you get less oxygen with every breath, leading to all kinds of negative side effects. But there are millions of people around the world who spend their whole lives at...

While it’s probably most famous for its role in gene editing, CRISPR does more than just that: its ability to precisely cut and alter DNA could lead to new antibiotics, faster diagnosis tools, and more.

Hank tells us the stories of three experiments in biology that, with creativity and luck, changed science & the world with it in their work to solve the mysteries of the universe.

You might have heard that one year in a dog’s life is equivalent to seven in a human’s. But it turns out that the real ratio is both higher AND lower—depending on your dog’s current age.

Learn about the history of dudes, and a new theory about deep voices in this new episode of SciShow News. You know, science... bro... stuff. Hosted by: Hank Green