Where does water come from? If you turn on the faucet, there's water. But it goes on an incredible journey to get there. Today, Jessi and Squeaks learn about all the places we can find water.

Squeaks is heading on a trip around the world! He's going to see so much, and wants Jessi to experience those sights, too. In this episode, he learns about how humans (and a couple of other animal guests) see.

In this video Paul Andersen shows you how to construct explanations with evidence in a mini-lesson on explanations with evidence. Two examples are included in the video and two additional examples are included in the linked thinking...

If someone (say, a small child) asks you why the sky is blue, you might dive into an explanation of Rayleigh scattering. But if you want to give them a way cooler explanation, you can tell them it's because of bacteria.



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It's no secret that people like pretty stuff, or that we like to make our worlds as pretty as possible. And for centuries, tons of people have used the mineral in this month's Rocks Box to paint the towns blue, so let's talk about some...

In the 1600s, Isaac Newton conducted a series of experiments to better understand the lights and colors that sometimes appear when your eyes are closed. If you’ve ever sat around an evening campfire or unintentionally glanced at the Sun,...

Exploring the rich meaning behind what we choose to eat, food ethnographer June Jo Lee unpacks how our "modern hungers" — or our deepest desires and need for connection — inform every bite. She decodes what Gen Z's palate says about the...

What is the best voting system? Voting seems relatively straightforward, yet four of the most widely used voting systems can produce four completely different winners.

Why is the Sun Yellow and the Sky Blue

This is Not a Rainbow

Earth didn't have water when it formed, but it does now! How did it get wet?

Have you ever wondered why leaves are green and not red, blue, or even black? We did too!

Watch as magician David Kwong engages an audience with a demonstration involving ChatGPT, showcasing its ability to generate creative responses and make playful deductions based on input from a volunteer. He sets up scenarios where the...

Whether you grew up with a poster of the solar system on your bedroom wall or not, you've probably got a specific idea of what the planets look like. From brilliantly blue Neptune to the "red planet" Mars. But if you managed to actually...

NASA has been using swimming pools to train astronauts since the 1960s. The largest is the Neutral Buoyancy Laboratory (NBL), which holds roughly 9 olympic pools worth of water and has contained not just mockups of space station and...

We're all used to our bodies being more or less the color they always are. But there are a few different medical reason you may be seeing rainbow in the mirror, from benign to medically concerning. Here's just some of the reasons that...

Explore 11 human body systems with the Amoeba Sisters in this updated video (2024). This video focuses on general functions for the following systems (and also provides a few structure examples): Circulatory, Digestive, Endocrine,...

If you could survive a trip to the very first moments of reality as we know it, what color would you see?

There's a few minerals that exhibit something called piezoelectricity and pyroelectricity, which mean that either heat or pressure can turn them electric. Here's a demo from the SciShow Rocks Box where you can see this for yourself - all...

Figuring out the age of a blinking speck in the sky is a difficult feat, especially if considering how many types of stars there are. This is where a Hertzsprung-Russell meets a gyrochronologist.

Computer models of climate change have long predicted that the ocean would turn green as a result of warming. But the change can't be seen by the human eye, so scientists weren't sure how they'd measure this effect... until it turned...

Blood is one of the most revolutionary features in our evolutionary history. Over hundreds of millions of years, the way in which blood does its job has changed over and over again. As a result, we animals have our familiar red blood....

The eyes are often the first thing we see when we look at someone. And when you look at them up close, everyone’s eye color is a kaleidoscope of shapes and hues. How does eye color work? The answer involves some very cool physics, and...

What color is a banana? Duh, it’s yellow. But what is yellow? Now that you mention it, how do we see color in the first place? That’s the series of questions that led me to making this video. It started simple and took me down a rabbit...