Happy Father's day! Today we're talking about the fintastic Nurseryfish, which is one of the best dads you can fish for.

This video will show how to set up and solve everyone's favorite 16 square Punnett square.

Horse plus donkey — it seems like an unlikely combination. I mean, they're different species! And yet, when they get together, they can produce a mule or the lesser-known hinny. Either way, those offspring usually can't become parents...

After weeks of discussion of human reproduction, today we arrive at the main event: THE SEX. Hank explains the four phases of the human sexual response, how a sperm finds and fertilizes an egg, creating a zygote, and how different types...

We're generally taught that chromosomes determine an animal's sex, but it is way more nuanced than that.

It’s pretty well known that Australia is home to some strange animals, but echidnas are especially weird evolutionary misfits.

Think you know a thing or two about sex? Think again. In this fascinating talk, biologist Carin Bondar lays out the surprising science behind how animals get it on. (This talk describes explicit and aggressive sexual content.)

Today, there are many ways to conceive a child, thanks to assisted reproductive technologies like IVF and egg-freezing. But the law lags behind these advancements, says attorney Ellen Trachman, troubling parents-to-be with...

Welcome to the romantic, violent, treacherous, and murderous mating lives of bugs.

In this enlightening, funny talk, Marlene Zuk shares just some of the ways that insects are truly astonishing -- and not least for the creative ways they have sex.

Chromosomes are fascinating little things, and today, Hank explains why more of them doesn't mean more complex, and why different organisms have different numbers of chromosomes. The short answer: mistakes happen.

How whale poop becomes perfume.

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FYI: We try to leave jargon out of our videos, but if you want to learn more about this topic, here are some...

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.

Researchers have been studying a promising option for male birth control, and we've learned a bit more about how regeneration works in hydras!

A safe, reversible option for male birth control has eluded scientists for decades, but a new pill is showing a lot of promise!

On a reef in the Pacific Ocean, 17,000 camouflage groupers dart about in the cloudy water. It is, in fact, an underwater orgy— turned feeding frenzy. An orgy might seem like a rather flamboyant way to breed, but sex in the sea is a...

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...

Two bespectacled science YouTubers enter, one bespectacled science YouTuber leaves ... because while they may look suspiciously alike, Joe Hanson has his own channels while Hank’s gonna stick around here. The only question is who will...

In the spring, just after a heavy rainfall, male and female fire ants swarm the skies for a day of romance, known as the nuptial flight. Thousands of reproduction-capable ants take part in a mating frenzy, and for one successfully mated...

At SciShow, we ask the tough questions. Today we explore the answer to the question "if identical twin brothers married identical twin sisters, would their offspring be identical?"

Hank gets down to the nitty gritty about meiosis, the special type of cell division that is necessary for sexual reproduction in eukaryotic organisms.

One of nature's most amazing recipes.

Hank sits down with clinical sexologist Dr. Lindsey Doe and talks about 'fighter sperm'. Then Jessi from Animal Wonders comes on to show off her Quaker Parrot the 'monogamous bird'.

Researchers are already trying to figure out if people can make space babies. If we need to live in space long-term, will our species be able to reproduce?