Join Squeaks and his favorite band, The Whizpops, for a musical experience with Manta Rays!

An overview of backpropagation, the algorithm behind how neural networks learn.

Think back to a really vivid memory. Got it? Now try to remember what you had for lunch three weeks ago. That second memory probably isn't as strong-but why not? Why do we remember some things, and not others? And why do memories...

Ever wonder what those little earthworms are up to? Learn why worms are wonderful with Jessi and Squeaks!

Kiran Bir Sethi shows how her groundbreaking Riverside School in India teaches kids life's most valuable lesson: "I can." Watch her students take local issues into their own hands, lead other young people, even educate their parents.

Jessi and Squeaks just did a really cool and easy experiment: they put a special kind of soap in the microwave and made it grow! Now they want to do it again to check their results and figure out how it happened!

Ice cream is a great treat, but you have to eat it slowly! Otherwise, you'll get what some people call a 'brain freeze,' which is a super bad headache that lasts for a couple seconds. But how does ice cream hurt your head?!

Jessi and Squeaks just spent the day hiking and sketching evergreen trees in their field journals! A lot of evergreen trees look pretty similar, but Jessi knows some fun ways to tell them apart. Join us to find out how!

Fog might make things seem mysterious and spooky, but it's actually a cool natural phenomenon that happens when cold air affects the water in the air!

From TVs to tablets, screens are ubiquitous in our modern society. What effect does that have on childhood development?

There’s no doubt that lithium has a diverse list of uses. But the way that it interacts with our bodies to help treat bipolar disorder is aiding us in better understanding the disorder and potentially developing new drugs to combat it.

FEED ME! In this episode of Crash Course Kids, Sabrina has a chat with us about what living things eat to get energy. What makes something an omnivore, or a carnivore, or an herbivore? And how do plants fit in to all of this? This first...

Are you sneezing more as it gets nicer outside? Jessi and Squeaks talk about allergies, and explain what your body is going through!

Mister Brown and Squeaks open Valentines from a bunch of their animal pals!

Can you guess how tall the tallest tree is? Neither could we! Tag along with Jessi and Squeaks to learn all about the world’s tallest tree!

Koalas live where it’s often hot and dry. But koalas can’t sweat! So how do they keep cool? Jessi has the answer!

In 1988, Matt Goldman co-founded Blue Man Group, an off-Broadway production that became a sensation known for its humor, blue body paint and wild stunts. The show works on the premise that certain conditions can create "aha moments" --...

Jessi and Squeaks are revisiting the fun times they had when they learned all about simple machines so they can solve all sorts of problems around the Fort!

It’s probably not a surprise that many ancient texts are a bit worn out and tattered, and that makes deciphering what they say quite a task. But with new computer tech and artificial intelligence, we are getting much clearer glimpses of...

In which John Green teaches you about the (English) colonies in what is now the United States. He covers the first permanent English colony at Jamestown, Virginia, the various theocracies in Massachusetts, the feudal kingdom in Maryland,...

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, and the ability to build on those...

The feeling of a kicking fetus is perhaps one of the more fun parts of having a baby, but these movements serve a purpose well beyond letting you know that that little thing is in there!

Diana Laufenberg shares three surprising things she has learned about teaching -- including a key insight about learning from mistakes.

In which John Green teaches you about the United States as it was in the 1990s. You'll remember from last week that the old-school Republican George H.W. Bush had lost the 1992 presidential election to a young upstart Democrat from...