SciShow
Fecal Shields, and 5 Other Ways Animals Use Poop
Proud of what you just did in the bathroom? You should be, but here are 6 animals who are masters of the art of pooping!
TED-Ed
TED-Ed: Can you solve the frog riddle? - Derek Abbott
You're stranded in a rainforest, and you've eaten a poisonous mushroom. To save your life, you need an antidote excreted by a certain species of frog. Unfortunately, only the female frog produces the antidote. The male and female look...
SciShow
The Most Incredible Octopus You’ve Never Heard of: The Blanket Octopus
All octopuses start out as teeny, tiny plankton, and most grow up to settle down on the seafloor. The blanket octopus, however, never settles down, and spends its life wandering the open ocean.
MinuteEarth
The Actual Reason Men Die First
Because females often outlive males, behavior is often blamed - but there is a decent chance our sex chromosomes might be to blame instead.
MinuteEarth
MinuteEarth Explains: Battle of the Sexes
In this collection of classic MinuteEarth videos, we take a look at how deep the divide between males and females actually goes.
TED-Ed
TED-Ed: The last living members of an extinct species | Jan Stejskal
In the savannahs of Kenya, two female northern white rhinos, Nájin and Fatu, munch contentedly on grass. They are the last two known northern white rhinos left on Earth. Their species is functionally extinct— without a male, they can't...
Crash Course
Reproductive System, part 2 - Male Reproductive System: Crash Course A&P 41
Our month-long exploration of human reproduction continues with a look at testicular anatomy, the steps of sperm production, and how it's influenced by gonadotropin and testosterone. Hank also explains how sperm mature, and how they...
Bozeman Science
X Inactivation
Paul Andersen explains how X inactivation works in mammals. This process was first described by Mary Lyon. Each cell in a female will have on activated and one inactivated X chromosome. This explains why almost all calico cats are female.
SciShow
Awesome Animal Dads
Let's talk about some of the awesome single dads out there in the animal kingdom!
TED Talks
TED: The surprising science of alpha males | Frans de Waal
In this fascinating look at the "alpha male," primatologist Frans de Waal explores the privileges and costs of power while drawing surprising parallels between how humans and primates choose their leaders. His research reveals some of...
SciShow
Why Do People Go Bald?
How does balding work? Why does it happen? And why are men so much more likely to lose their hair than women? Quick Questions has the answers!
Crash Course
The Reproductive System: How Gonads Go - CrashCourse Biology
Hank lets us in on the meaning of life, at least from a biological perspective - it's reproduction, which answers the essential question of all organisms: how do I make more of myself? So, sex, how does it work?
SciShow
Why Do Women Live Longer Than Men?
Evidence strongly suggests that men have, on average, a shorter lifespan than women, but scientists aren't exactly sure why that is. Check out today's QQ to learn more about this mortality mystery.
SciShow
Your Pee is Pollution
Ever wonder what happens after you flush? You should, because your pee is causing problems! Hank talks about how, and why, human waste is having weird effects on the natural world. We're talking homicidal fish and hermaphroditic frogs...
SciShow
Seahorse Pregnancies Could Help us Treat HIV
Many seahorse species have males with full-blown pregnancies. But in order to do this, their immune system is missing something kind of important.
SciShow
Condor Females Don’t Need a Male to Hatch Chicks
For the first time, researchers have observed two cases of asexual reproduction in condors. And it also turns out that whales are much hungrier than we thought.
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 Kids
How Do Ants Find Food?
Jessi and Squeaks talk about some surprise visitors that came to check out their picnic: Ants!
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.
TED-Ed
TED-Ed: Sex determination: More complicated than you thought - Aaron Reedy
From something as small and complex as a chromosome to something as seemingly simple as the weather, sex determination systems vary significantly across the animal kingdom. Biologist and teacher Aaron Reedy shows us the amazing...
SciShow
Mendel Got Extremely Lucky (...or Maybe He Lied)
Science, while often the result of a stroke of genius, can just as easily be a stroke of extraordinarily good luck. Mendel’s work just happened to be a mix of the two.
TED-Ed
TED-ED: The surprising reasons animals play dead - Tierney Thys
From lemurs to lizards, ants to amphibians, sharks to chickens, hundreds of animals "play dead" as a survival tactic. But how and why do animals do this? Tierney Thys explains how this curious behavior, known as tonic immobility or TI...
SciShow
6 Animals with Extraordinary Adaptations to Cave Life
Living in a cave isn’t easy, but these six cave-dwelling animals have gained some amazing traits to help them survive there!