What's the largest river on Earth? If you said "the Amazon".... you're only half right. Scientists have discovered an even bigger river in South America, and it's in the sky above the Amazon rainforest. Turns out, this sky river is the...

In this video Paul Andersen explains how a system can be viewed as an object and an object can be viewed as a system.

Hydrothermal vents are some of the most extreme environments on the planet. But in 2000, scientists discovered a vent unlike any other, one that spews white smoke and is 10 times older. And some think it may help us understand how all...

This week's SciShow news brings you discoveries involving two of the most exotic substances on Earth - the world's rarest element and the world's oldest water. Two great tastes that taste great together? Stay tuned to find out.

An average teaspoon of ocean water contains five million bacteria and fifty million viruses -- and yet we are just starting to discover how these "invisible engineers" control our ocean's chemistry. At TEDxMonterey, Melissa Garren sheds...

Floods, droughts, heat waves and cold blasts -- why is the weather becoming more extreme? Environmentalist and "America's weatherman" Al Roker discusses the link between climate change and disruptions to weather patterns worldwide,...

Chlorofluorocarbons, or CFCs, seemed too good to be true when they were first created, and before long astronomers studying Venus' atmosphere discovered what could go wrong with this "miracle molecule."

Scientists have been searching for alien life by honing in on the existence of liquid water, but we might be overlooking some types of life out there that doesn't need water at all.

Our understanding of the world has to start somewhere! And while early ideas like the Hollow Earth Theory are mostly wrong and sound silly to us now, that doesn’t mean they weren’t important.

DO A BARREL ROLL! Or at least, try…? The iconic move from Star Fox seems so easy, just press a button and BOOM. The ship rolls. But HOW? Barrel rolls in atmosphere are easy to execute with the use of ailerons, but in space, it's a...

Most scientific literature is written only in English, creating an alarming knowledge gap for the 75 percent of the world who don't speak it. That's a big problem for climate change -- because it's hard to take action on something you...

While astronomers are busy searching for life beyond Earth, they’ve also started asking another question: If life seems so difficult to find, then why is our world so full of it? One answer might be overhead right now: the Moon!

SciShow heads to Washington D.C. to join the March for Science and interview people about why they feel science is important to them.

Every 12 years, a megacity springs up in India for the Kumbh Mela religious festival -- what's built in ten weeks is completely disassembled in one. What can we learn from this fully functioning, temporary settlement? In a visionary...

Foraminifera - tiny, single-celled marine life forms - build gorgeous houses that record how much ice there is on the planet.



FYI: We try to leave jargon out of our videos, but if you want to learn more about this...

In this video Paul Andersen explains why astronauts are weightless. He also explains how Newton's Universal Law of Gravitation can be used to calculate the gravitational force between objects.

Usually, you can count on a river to flow in one direction, but some things can make it reverse course. Aside from being weird and surprising, these river reversals can often reflect geological changes and have long-lasting impacts on...

Dark Energy is what we call the mysterious force that seems to be pushing the universe apart. By some calculations, it makes up 70% of everything in nature. Or...maybe it doesn’t exist at all! Plus, Juno’s observations give us new...

Extreme environments full of life on Earth have led researchers to expand the definition of habitability to something that includes many more planets, potentially leading us to evidence of living things in a dramatically shorter time!...

In which John Green, Hank Green, and Emily Graslie teach you about our Sun, and the formation of the planets. We're going to focus on the formation and development of the Earth, because that's where people live. You'll learn about the...

That baby is staring at you, and you don't know why. Something in your teeth? Did you accidentally leave a tag on your clothes? Don't worry,that baby probably just likes your face.

Four rocky inner planets and four gaseous outer planets - makes sense, right? But when astronomers turned their eyes to planets beyond our star system they found out that many systems are set up differently. Why?

How do we know what the air is like on planets we haven't visited? This video explains how to see air from 150 light years away. Thanks to NASA's James Webb Space Telescope project at the Space Telescope Science Institute for supporting...

NASA releases a Giant Ballooon and we learn more about the Martian ice age!