We re taught that chromosomes define biological sex: XX = female, and XY = male. However it s not quite that straightforward. Hank Green hosts as we explain how science proves that biological...

Around the world, there are lakes that disappear without warning. Then, suddenly without warning, they sometimes return! This vanishing and reappearing affect reveals some surprising connections....

From turkeys to pigeons to eagles to chickadees—let s talk birds! There are some super cool birds out there that just don t get enough press! Enjoy this new SciShow compilation hosted by...

Is it actually possible to get pregnant while already pregnant? Turns out, you can. This rare but possible phenomenon is called superfetation—we ll explain all about it in this new episode...

While you may assume they re boring, plants actually lead fascinating lives, and completely define the world we live in today! Join Olivia Gordon for a SciShow collection of episodes about...

This week on Crash Course mythology, Mike is talking to you about floods. You may have heard the story of Noah and the Ark from the Bible, but that is not the only flood story humans tell....

This week on Crash Course Big History, Emily is talking about process of human evolution, and the knack for innovation that has allowed humans to become so dominant on the Earth. Human innovation,...

Get your first two months of CuriosityStream free by going to http://curiositystream.com/crashcourse and using the promo code “crashcourse”. So you may have heard of Moore s Law and while...

How do sociologists study and understand social interaction? Today we’ll explain the language sociologists use to discuss how we interact with the social world. What are statuses and roles?...

Get 10% off a custom domain and email address by going to https://www.hover.com/CrashCourse. So as you may have noticed from last episode, computers keep getting faster and faster, and by...

On this Crash Course in World Mythology, Mike Rugnetta is teaching you about floods and deluges, specifically in China. In Chinese myth, flood stories pretty much all revolve around a guy named...

How do the groups that you re part of affect you? How do you, in turn, affect those groups? Today we are talking about how people in society come together with a look at social groups. We’ll...

Pre-order our limited edition Crash Course: Computer Science Floppy Disk Coasters here! https://store.dftba.com/products/computer-science-coasters So we’ve talked about computer memory a...

Hollywood was riding high until their formula got to be stale. In places like Italy and France (as well as other places in the world we ll talk about soon) filmmakers were starting to break...

We don’t want to deluge you with information on the subject, but this week on Crash Course Mythology, Mike Rugnetta is talking once again about floods. We’re looking at ancient flood myths...

Today we are exploring the world of formal organizations. We’ll go back to the historical process of rationalization and its impact on organizations in the form of bureaucracy and then discuss...

Globalization has been in process for centuries, and has had a huge effect on Big History, and on Collective Learning. This week, Emily is investigating early globalization through three things...

Today we’re going to look at how our computers read and interpret computer files. We’ll talk about how some popular file formats like txt, wave, and bitmap are encoded and decoded giving...

This week on Crash Course World Mythology, it s the Circle of Life. And Death. And sometimes, Life again. Mike Rugnetta is teaching you about Dying Gods, by which I mean gods that die, and...

As the New Hollywood gained steam in the late 70s and early 80s, another revenue stream opened its doors: home video. From Betamax to Laserdisc to Bluray to streaming services, home video revolutio...