The determinant has a very natural visual intuition, even though it's formula can make it seem more complicated than it really is.

Why do apples turn brown after you cut them, or when they rot? Basically for the same reason that human hair, eyes and skin is brown, too. Not that we're calling you rotten. Quick Questions explains!

The sky is blue, but according to whom? Could the rules of our language affect the way we perceive color?

A wide range of Americans contributed to the Civil Rights Movement in the 1950s and 1960s. Students and young people were a prominent group of activists within the movement. Today, we'll learn about the Little Rock Nine, the Greensboro...

Bill and Webb can’t seem to agree, so they head the The Fort where Mister Brown tries to help them work together by teaching them about mutualisms, or when different types of animals help each other in the wild!



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With rising temperatures and seas, massive droughts, and changing landscapes, successfully adapting to climate change is increasingly important. For humans, this can mean using technology to find solutions. But for some plants and...

A bit of the history behind how we came to use the symbol "pi" to represent what it does today, and how Euler used it to refer to several different circle constants.

Today Hank brings us the news of a unique astronomical discovery - a rogue planet. He also allays our fears of an apocalyptic collision with Earth. So, this new planet is awesome, but it needs a different name - CFBDSIR...

From corundum to alexandrite, there are rare minerals have multi-colors caused by how they form their structure!<br/>

Maybe you've seen a shooting star, a bright streak of light that zips across the sky! But did you know that those shooting stars are actually rocks falling from space? And sometimes you can find them on the ground! Find out how...

After a friend of mine got a tattoo with a representation of the cosecant function, it got me thinking about how there's another sense in which this function is a tattoo on math, so to speak.

Our friend Elliot thought we should do an episode about composting... so we did! Learn all about how you can turn certain types of trash into nutrient packed soil you can use in the garden!

Hank veers away from human anatomy to teach us about the (mostly) single-celled organisms that make up two of the three taxonomic domains of life, and one of the four kingdoms: Archaea, Bacteria, and Protists. They are by far the most...

Even an empty lunch sack is useful to science. You can examine it and come up with some traits. In this episode, Sabrina chats about things like malleability, hardness, conductivity, and magnetism. And all with lunch! This first series...

We all know that the Earth is huge, but what is it made of? Join Jessi and Squeaks for a fun activity to learn about Earth's layers, and to make your own model of Earth!

New ReviewVisit Harpers Ferry National Historical Park, where John Brown and his raiders help kickstart the American Civil War.

Watch as Mark surprisingly finds then gets slashed and stung by the world's biggest scorpion: the Giant Asian Forest Scorpion! Where will it land on the Brave Wilderness Bite-Sting Index? How will the pain compare to all the other...

This video describes the difference between incomplete and codominance of genetics.

Howcast - Let professional makeup artist Patricia Longo teach you how to do natural makeup in this makeup tutorial from Howcast.

Howcast - Learn how to cover your roots in this Howcast hair tutorial featuring celebrity hairstylist Jacqueline Bush.

Howcast - Learn how to create a palm tree nail design in this Howcast nail tutorial.

Howcast - Learn the English words for colors in this Howcast ESL video with English teacher Megan Brach.

Howcast - Learn how to do your lip makeup for a chola look in this Howcast makeup tutorial with expert Patricia Longo.

Howcast - Learn about the colors on a military map in this US army basic training video from Howcast with Sergeant Michael Volkin.