You may have heard about a new invasive menace in the US. The spotted lanternfly is a relatively recent arrival from China, and while they may be tiny, they have the potential to cause some serious problems. So let's talk about what...

Lung Cancer has been stigmatized as something that mainly happens when you smoke cigarettes. But non-smoking lung cancer may be a new disease changing the narrative.<b<br/>r/>

Hosted by: Hank Green (he/him)

One fun fact about elephants is that they're a lot less likely to get cancer than other animals (including us). Another fun fact is that unlike most warm-blooded animals, their testes are deep inside their bodies. It turns out, these...

Iridescent hematite, aka turgite, is rust with a great makeup artist. This beautiful mineral shines in all the colors of the rainbow. And scientists are completely split as to why. This month, SciShow Rocks Box subscribers will receive...

In the 1920s, archaeologists discovered that the young pharaoh Tutankhamun was buried with a fancy iron dagger. It wasn't just fancy because part of it came from outer space; it was also made by artisans in another kingdom and given as...

It's no secret that humans have big brains, especially compared to the rest of the animal world. But big brains require big energy to power them, and shifting around all our calories to fuel our massive brains was no small feat. From...

Inventing cutting edge medicines to cure devastating diseases is one thing. Getting them into patients is another. Today we talk about a scientist who figured out how to do just that.<b<br/>r/>

Hosted by: Hank Green (he/him)

In the 1970s, archaeologists discovered a strange grave in western Belgium, dating back to 100 CE or so. Unlike the 76 other graves, it actually had a skeleton inside it. But 50 years later, we learned it was even weirder, because that...

It's impossible to have something colder than absolute zero...right? That's why it's called "absolute zero". Well, it turns out you can get certain substances to negative absolute temperatures (e.g. -1 Kelvin)...but in order to do so,...

You've probably heard that urine is sterile. And we're only just learning that's not true. Understanding the urinary microbiome could help us find new ways to treat kidney stones, UTIs, and even bladder cancer.



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In 2021, a crew of civilian astronauts spent three days in Earth orbit. While they were up there, they performed a bevy of experiments. And not only did we learn more about what space travel can do to the human body, we also learned...

Chocolate being one of the world's most delicious foods, you'd think we would know everything about it. /Somebody/ domesticated wild cacao. It's just… nobody really knows who, or when… or where. But if we want chocolate for the long...

Dry cleaning has gone from kerosine to perc to wet cleaning in an attempt to make it less ...deadly. Over the years, dry cleaning has evolved to address the dangers of flammability, interactions with your lungs, and environmental harm,...

The Chocolate Hills of Bohol, Philippines are so perfectly shaped that local legends say they were crafted by giants. Geologists can't agree exactly what happened, but the answer might be as simple as limestone, water, and...

Humans have known that uranium can cause health problems since at least the 1820s. But that hasn't stopped us from making stuff with uranium in it over the past two centuries. Like teeth, toys, and diabetes treatments!



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It's one of the great boomer vs. millennial debates: Do you have to sort your laundry? It's tedious to pull apart lights and darks, hot water and cold water, but thanks to advancements in science, that all may be a thing of the...

Ever wondered why you tense up, get pale, and eat too much when stressed? There's a very good evolutionary reason. <b<br/>r/>

Hosted by: Savannah Geary (they/them)

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,...

Explore the concept of biological evolution with the Amoeba Sisters! This video mentions a few misconceptions about biological evolution before providing a general definition. Then this video provides a description of four different...

Why is the Sun Yellow and the Sky Blue

This is Not a Rainbow

In which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates, but the way that things unfolded in July and August of 1914 are kind of important to understanding the Great...

You might think of national parks as a nice place to see a geyser, or a big ol’ canyon, but over the past 100 years, US national parks have produced some of the biggest, oldest, deepest, and creepiest discoveries that have been made in...

In which John Green teaches you WHY World War I started. Or tries to anyway. With this kind of thing, it's kind of hard to assign blame to any one of the nations involved. Did the fault lie with Austria-Hungary? Germany? Russia? Julius...