SciShow
Help, I’ve Lost My Butt!
It feels like for an animal, having one's butt fall off would be pretty bad. But apparently that's not always the worst thing to happen, at least not for these specific animals.
SciShow
Inbreeding with Yourself
*At the time this video was made, it had been reported that Charlotte the round ray was pregnant. However, new information has come out that she was never pregnant with parthenotes, and in fact had a reproductive disorder, which is a...
Be Smart
Why Are There As Many Males As Females?
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...
Be Smart
Why Is Sex a Thing?
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...
SciShow
Will Climate Change Turn More Reptiles Female?
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.
SciShow
Plants That Keep Themselves Warm
Sometimes, plants do unexpected things. Like control their own body temperature.
SciShow
The Fly That Lays Eggs in Toad Nostrils
We were probably all told to quit picking our noses at one point, and by most standards, this is good advice. But if you were a toad, it might come in handy to scratch away blowfly eggs.
SciShow
A Brief History of Birth Control
Gym teacher Hank gives us the full story of the past, present, and future of birth control.
SciShow
Colorado's Bright Yellow River, and Why Fruit Flies Mate
This week on SciShow News, toxic waste from an abandoned mine turned a river yellow, and new research shows that threatened fruit flies may have more diverse offspring.
SciShow
9 of the Weirdest Sperm Adaptations
You probably have a vague idea of what sperm does, but not all sperm are created equal, and some have even developed unique adaptations to get where they're going.
SciShow
Monogamy
Hank examines the zoological definition of monogamy, as well as some other breeding strategies that animals use.
SciShow
Why Yapoks Need a Pouch for Their Junk
Yapoks are cute aquatic marsupials, and they're the only living creatures that need pouches for their sacs.
SciShow
7 Extreme Animal Moms
From changing diapers to cleaning up vomit, human parents can have it tough, but at least they don't have to incubate their babies under their skin or liquify their own guts to feed their brood like these animal moms do! In honor of...
SciShow
Gregor Mendel: Great Minds
Hank brings us the story of Gregor Mendel, the Austrian monk who, with the help of a garden full of pea plants, discovered the fundamental properties of inheritance and paved the way for modern genetics. He also gives us the dirt on a...
SciShow
3 New Facts About Denisovans
Hank brings us some late-breaking news from the genus Homo - a team of scientists has sequenced the genome of the Denisova hominin, the latest member to be added to the human family tree.
SciShow
You Can Inherit Mitochondrial DNA from Both Parents! | SciShow News
Earlier this week, a team of researchers announced that they’d made a discovery about how we inherit mitochondrial DNA from our parents that could change what we know about not only disease inheritance, but human history as a whole.
SciShow
Why Did You Skip a Period?
Have you had a normal menstrual cycle and then you suddenly miss a period? There are different reasons why this can happen, and if you don't experience a period you were expecting, you’ll probably want to talk to your health care...
SciShow
The Sexiest Compilation Ever | Compilation
Sex can be a taboo conversation, but over the years we found out that our viewers had a lot of questions about it. So we’ve put some of the answers to those questions into one video!
SciShow
How Researchers Made Mice Pups from Two Moms and Two Dads | SciShow News
This week in news: Scientist successfully breed mice using same-sex parents and some very clever genetic engineering.
TED-Ed
TED-Ed: No one can figure out how eels have sex | Lucy Cooke
From Ancient Greece to the 20th century, Aristotle, Freud, and numerous other scholars were all looking for the same thing: eel testicles. Freshwater eels could be found in rivers across Europe, but no one had ever seen them mate and no...
TED-Ed
The world's largest organism | Alex Rosenthal
The largest animal in the world is the blue whale, which weighs a massive 150 metric tons. Even so, it's not remotely close to being the largest organism by weight. That title goes to an organism so huge that it's estimated to weigh the...
SciShow
Why Do Fish School?
You might think that fish ride the undercurrents with all their buds to avoid the hungry mouths of predators - safety in numbers, right? But, it turns out, there’s more to consider when asking why fish swim in schools.
SciShow
The Male Biological Clock
Another aging rock star, another baby, does age have any affect on sperm, or are these little swimmers seemingly viable until death?
TED-Ed
TED-ED: The evolution of animal genitalia - Menno Schilthuizen
Genitals are the fastest-evolving organs in the animal kingdom. But why is this so? And what's the point of having decorative private parts? Menno Schilthuizen explains how the evolutionary biology of nature's nether regions uncovers a...