In which John Green teaches you about railroads, and some of the ways they changed the world, and how they were a sort of microcosm for the Industrial Revolution as a whole. Prior to the invention of steam powered railroads, pretty much...

In which John Green teaches you MORE about Bill Shakespeare's Hamlet. John talks about gender roles in Hamlet, and what kind of power and agency Ophelia and Gertrude had, if they had any at all (spoiler alert: we think they did). You'll...

Energy poverty, or the lack of access to electricity and other basic energy services, affects nearly two-thirds of Sub-Saharan Africa. As the region's population continues to increase, so will the need to build a new energy system to...

The energy in the universe never increases or decreases -- but it does move around a lot. Energy can be potential (like a stretched-out rubber band waiting to snap) or kinetic (like the molecules that vibrate within any substance). And...

In this menstrual cycle video, explore the ovarian cycle and uterine cycle with the Amoeba Sisters! This video will walk through major events in phases of the ovarian cycle (follicular phase and luteal phase) and phases of the uterine...

In 1989, Ebola landed on U.S. soil. After appearing in a research lab in D.C., a heroic U.S. Army scientist put her life on the line to prevent an outbreak. Inspired by true events and starring Julianna Margulies, THE HOT ZONE premieres...

Do you know anyone with freckles? Maybe you have freckles yourself! Jessi has them, and she's been wondering what they are, where they come from, and why some people have them and some people don't!

The good news is that your experimental robo-ants are a success. The bad news is that you accidentally gave them the ability to shoot deadly lasers . . . and you can't turn it off. Can you stop them from escaping their habitat before the...

Rainforest Edition: Ants in The Rainforest.

Join the Amoeba Sisters as they introduce the basics about cladograms and phylogenetic trees. The Amoeba Sisters walk through the process of building a basic cladogram and mention vocabulary such as: shared ancestral character, shared...

What keeps us happy and healthy as we go through life? If you think it's fame and money, you're not alone - but, according to psychiatrist Robert Waldinger, you're mistaken. As the director of a 75-year-old study on adult development,...

Why Does Earth Have Deserts? For the same reason it has Rainforests: Hadley Cells!!!

How do we find fulfillment in a world that's constantly changing? Raymond Tang struggled with this question until he came across the ancient Chinese philosophy of the Tao Te Ching. In it, he found a passage comparing goodness to water,...

Equity expert Sara Sanford offers a certified playbook that helps companies go beyond good intentions, using a data-driven standard to actively counter unconscious bias and foster gender equity -- by changing how workplaces operate, not...

How high can you count on your fingers? It seems like a question with an obvious answer. After all, most of us have ten fingers -- or to be more precise, eight fingers and two thumbs. This gives us a total of ten digits on our two hands,...

All the stars in a spiral galaxy rotate around a center -- but to astronomers, the speed that each star travels wasn't making sense. Why didn't stars slow down toward the edges as expected? Don Lincoln explains how a mysterious force...

This video helps shed light on the reasons behind CISO resignations and provides strategies for creating a fulfilling and sustainable career path.

This video explains how to use the extender tab

Howcast - Learn how to do the Bart Simpson from professional dancer Charlene "Chi-Chi" Smith in this Howcast dance video.

Hey there! Looking for fun, awesome piano lessons for kids ages 6-10? Check out this video!

Hey there! Looking for fun, awesome piano lessons for kids ages 6-10? Check out this video!

Hey there! Looking for fun, awesome piano lessons for kids ages 6-10? Check out this video!

Hey there! Looking for fun, awesome piano lessons for kids ages 6-10? Check out this video!

Hey there! Looking for fun, awesome piano lessons for kids ages 6-10? Check out this video!