Nalini Nadkarni challenges our perspective on trees and prisons -- she says both can be more dynamic than we think. Through a partnership with the state of Washington, she brings science classes and conservation programs to inmates, with...

This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.

Climate change is happening we all need to get serious about limiting our carbon dioxide emissions! At the same time, scientists are looking for plan B because we might need it.

Who controls the internet? Increasingly, the answer is large corporations and governments -- a trend that's threatening digital privacy and access to information online, says web developer Tamas Kocsis. In this informative talk, Kocsis...

Paul Andersen describes microevolution and macroevolution in the stickleback fish of Loberg Lake. He describes how anadramous fish repopulated the lake after poisoning and adapted to the new environment through natural selection. He...

The flu might feel like some minor illness that you don't need to worry about much, but tens of thousands of people still die from it every year. And back in 1918, Flu killed up to 5% of the world's population. Could a flu that bad...

The supercontinent Pangaea, with its connected South America and Africa, broke apart 200 million years ago. But the continents haven't stopped shifting -- the tectonic plates beneath our feet (in Earth's two top layers, the lithosphere...

If you have had a UTI before, maybe you've tried some cranberry juice or cranberry pills to ease the symptoms. Your mom suggested it, or even your doctor prescribed it, so it should work, right? But do you really know why cranberries are...

In a deeply moving letter to her grandmother, Xiye Bastida reflects on what led her to become a leading voice for global climate activism -- from mobilizing school climate strikes to speaking at the United Nations Climate Summit...

A backyard astronomer holds the world record for most supernovas found by searching manually. He's memorized what over a thousand galaxies look like.

Last week, the World Health Organization announced that a malaria vaccine has finally made it through all the regulatory hurdles and is being distributed in the country of Malawi. Learn how it works and why it’s taken so long to develop...

The treatment for viral gastroenteritis has been stay near a toilet and drink lots of fluids. But new research into cytokines has the potential to change that.

Why does February only get 28 days when all the other months get 30 or 31? The answer is part superstition, part politics, and parts astronomy. Basically, it's the Romans' fault.

It's Okay to Be Smart: Is Sugar A Drug?

Want to learn more about the topic in this week's video? Here are some keywords/phrases to get your googling started: <br/>
greenhouse gases, climate change, radiative forcing,

When you think of herbs, you might picture rosemary, basil, or dill weed, but you can add something a bit bigger than that to your mental herb collection: good ol' bananas.

As we get ready to watch that big football game that my lawyers tell me I'm not allowed to say the name of, let's celebrate a champion of the bird world: Stealthy and silent owls! Learn how owls fly so silently, how they see in the dark,...

Explore DNA structure/function, chromosomes, genes, and traits and how this relates to heredity! Video can replace old DNA structure & function video and in addition covers foundational concepts of heredity. Table of Contents: Video...

In this short, image-packed talk, Marisa Fick-Jordan talks about how a village of traditional Zulu wire weavers built a worldwide market for their dazzling work.

We are in spring! And with spring come bees! In this episode of SciShow Compilation we bring the best episodes of bees and honey!

Starting in 80 CE, residents of Rome and visitors from across the Roman Empire would fill the stands of the Colosseum to see gladiators duel, animals fight and chariots race around the arena. And for the grand finale, water poured into...

What IS Angular Momentum?

Vaccines save millions of lives each year, so we owe a lot to the people that pioneered that medical breakthrough. But the concept of a vaccine had already existed for a long time before it was “discovered,” and the real story is way...

No matter how healthy you are, you likely end up feeling sick at least a few times a year. And we have many pharmaceutical options these days to help us feel better. But some non-pharmaceutical remedies are supported by science,...