SciShow
5 Regrettable Things People Did With Uranium
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! Hosted by:...
SciShow
Do You Have to Sort Your Laundry?
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 past....
SciShow
Stress Eating Explained (And Other Weird Fight Or Flight Responses)
Ever wondered why you tense up, get pale, and eat too much when stressed? There's a very good evolutionary reason. Hosted by: Savannah Geary (they/them)
SciShow
5 Ways CRISPR Is About to Change Everything
CRISPR-based gene therapies are already changing healthcare for things like sickle cell disease. But CRISPR is bigger than just medicine, and it could revolutionize everything from food and agriculture to green energy fuels to plastics....
SciShow
Sometimes…Jellyfish Live on Land
Myxozoans are so weird. They're jellyfish the size of single-celled organisms. Some of them even live on land. New weirdest animal just dropped. Hosted by: Savannah Geary (they/them)
SciShow
6 of the World’s Weirdest Trees
Today we're talking about the weirdest trees in the world, from the psychedelic rainbow eucalyptus, to the dragon's blood tree, to the jabuticaba that grows delicious fruits on its trunk. Hosted by: Hank Green (he/him)
SciShow
That Time Our Ancestors Almost Went Extinct
There's a lot of humans on our planet. But our global domination was hardly a given. New evidence suggests that our ancestors were on the brink of total extinction nearly a million years ago. So let's talk about that time when the Homo...
SciShow
How Snakes Hijacked Our Brains
Sometimes, one animal ends up in an evolutionary arms race with another for millions of years. Here are four fascinating examples, including our own showdown with snakes. Hosted by: Jaida Elcock (she/her)
SciShow
A Fish In This Lake Evolved Into 850 Different Species
When conditions are just right, one species can turn into hundreds in a short period of time. Welcome to the weird world of adaptive radiation. Hosted by: Jaida Elcock
SciShow
Where Scientists Keep the World's Most Endangered Animals
Even when a species has officially gone extinct, there's sometimes still hope of saving it. Scientists keep insurance populations of endangered animals all over the world with the goal of one day reintroducing them to the wild. Hosted...
SciShow
The Ancient Crops We've Forgotten How to Grow
Today, humans live on just a few staple crops, like maize, rice, and wheat. But in the early days of agriculture, humans were domesticating foods left and right. Come with us as we discover the lost crops of North America, like pitseed...
SciShow
The OTHER Amazing Thing Easter Islanders Did with Rocks
Did the Easter Islanders really cause their own civilization's collapse? Probably not. In fact, they used rock gardens to grow food sustainably on the island of Rapa Nui for centuries. Hosted by: Savannah Geary (they/them)
SciShow
These Islands Shouldn't Exist
You've probably heard that climate change is leading to rising sea levels, which is bad news for lots of islands. But for some islands like the Maldives, rising waters are making them... bigger? Correction: We mixed up east and west!...
SciShow
Fish Need a Better Weather Forecast
Climate disruption threatens food security around the world, but it's especially dangerous for fish farmers. Here's how high-tech climate information services can help then adapt. Hosted by: Hank Green (he/him)
SciShow
Space, Goats, and Climate Change
Support for this video provided by Gates Ventures. Hosted by: Reid Reimers (he/him)
SciShow
Yes, Flights ARE Bumpier Now (And They're Getting Worse)
It's not just your imagination. Turbulence on airplane flights is getting worse, including severe turbulence that could cause injuries. The reason is the climate crisis -- here's how. Hosted by: Tom Lum
SciShow
Are Energy-Efficient Windows Bad For Us?
Low-E windows have reduced the amount of energy required to heat and cool our buildings, a critical step in fighting climate change. But new research suggests we've lost something beneficial in the process. Hosted by: Hank Green (he/him)
SciShow
That Time A Tsunami Lasted 9 Days
In September of 2023, researchers detected a strange vibration all across the planet. They traced it back to a massive tsunami off the coast of Greenland, but the sound went on even after the wave was gone. As in, for nine full days....
SciShow
Permafrost Is Not What You Think It Is
If you've ever heard about things like mammoths being found in permafrost, you may have an image in your head of what that looks like. But you might be wrong! So let's talk about what permafrost really is, why it's so important, and why...
Crash Course
The Unexpected Truth About Water: Crash Course Biology #21
This is a love letter to water, life’s solvent, and one of the most wonderful molecules around. In this episode of Crash Course Biology, we’ll learn about how water’s polarity and hydrogen bonding help it sustain life on a larger scale....
Crash Course
Population Ecology: How We Saved the Bald Eagle: Crash Course Biology #7
When the Bald Eagle population started to decline in the mid-20th century, scientists began to ask why. Population ecology, the study of organisms of the same species, played a big role in answering that question. In this episode of...
Crash Course
Speciation: Where Do Species Come From?: Crash Course Biology #15
How can you tell two species apart? It’s not always simple. In this episode of Crash Course Biology, we’ll learn about speciation—a process that can happen over millions of years, or within a single generation. Along the way, we’ll...
Crash Course
Natural Selection: Life's Way of Stayin' Alive: Crash Course Biology #13
There are lots of ways that evolution happens, and natural selection is just one of them. In this episode of Crash Course Biology, we’ll find out how this process works and shapes traits in all living things —from ginkgo trees to howler...
Crash Course
Microevolution: What's An Allele Got to Do With It?: Crash Course Biology #12
Whether we’re talking about tigers, trees, or tarantulas, evolution happens at the level of the population. In this episode of Crash Course Biology, we’ll find out how natural selection, gene flow, genetic drift, and other processes...