Water can dissolve more substances than anything else on earth...so why doesn't it dissolve everything away?

Join Hank Green to learn ten weird, scary, and amazing things fungi can do!

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Heavy water, or deuterium oxide, has some important scientific applications, but let's say you're reeeeaallly thirsty... is it safe to drink?

Do you like drinking milk or chatting with your friends? Well, you can enjoy those because of the evolution happened over the past million years, and we are still evolving. Let's find out what will we be like in the future with us!

Are there ways to terraform Mars -- that is, make it habitable for humans? Some scientists think so. They have big plans, but they also face some big obstacles.

Paul Andersen explains the concept of coevolution. He begins with an analogy comparing the relationship of humans to technology with those of coevolving species. He then discriminates between coevolution and convergent evolution. He...

You'd think we'd know everything there is to know about sexual reproduction. But as it turns out, there are still quite a few things we picked up that aren't exactly true, and we're here to correct that. Chapters NEW EGGS 1:47 MENSTRUAL...

Humans have always peed and pooped, but where it goes after we’ve done our business has changed a lot. In fact: The water you just drank may well have been a part of someone’s urine just weeks ago! SciShow explains!

Is overpopulation real? Is Earth filling up with too many humans? How many people can Earth hold, anyway? As our species approaches 8 billion, human overpopulation is a major concern for many people. How can we reduce poverty and our...

Epigenetics: Why Inheritance Is Weirder Than We Thought

World-class sprinters just keep getting faster, with some running over 40 kilometers per hour! That kind of makes you wonder… how much faster can humans get?

Houseplants can be great for your mental health, but eating some of them can be far worse for your bodily health than you might think.

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In which John Green investigates the dawn of human civilization. John looks into how people gave up hunting and gathering to become agriculturalists, and how that change has influenced the world we live in today. Also, there are some...

In which John Green teaches you about population. So, how many people can reasonably live on the Earth? Thomas Malthus got it totally wrong in the 19th century, but for some reason, he keeps coming up when we talk about population. In...

We have a lot of water on Earth, but we also can't actually drink much of it... or use it for farming. That's because most of the water on Earth is saltwater. We humans, like a lot of living things, need freshwater to survive. In this...

Nobody knows exactly when humans began to create fermented beverages. The earliest known evidence comes from 7,000 BCE in China, where residue in clay pots has revealed that people were making an alcoholic beverage from fermented rice,...

Alcohol has been an important part of human culture for a very long time, and from the basic process, we've figured out how to create a wide variety of alcohol beverages!

Of all the species that humans have domesticated, dogs are our oldest animal friends. But how did a group of wolves become the furry pup at the end of the bed? New research is finally unlocking the paw-in-hand evolution of dogs and...

Evolution is particularly vulnerable to misunderstandings around the scientific language. SciShow clears up some confusing language!

So, how are people fixing their water problems? In this episode of Crash Course Kids, Sabrina talks about a few different examples how some freshwater sources were good, then bad, then made good again. Also, Sabrina talks about...

From lemurs to lizards, ants to amphibians, sharks to chickens, hundreds of animals "play dead" as a survival tactic. But how and why do animals do this? Tierney Thys explains how this curious behavior, known as tonic immobility or TI...

Paul Andersen describes three main characteristics of life that are conserved in all organisms on the planet. The universal genetic code, the central dogma of biology, and shared metabolic pathways give us details of the original...

Today we’re going to talk about the collection of routes known as the Silk Roads, and explore how worldview and other ideas spread along those trade routes. The Silk Roads are responsible for everything from the spices we use when we...

We can now implant memories into birds’ brains to teach them how to sing, and human fetuses have a couple muscles that disappeared from our adult ancestors over 200 million years ago.