In this video Paul Andersen explains how stratospheric ozone protects humans from ultraviolet light. He explains how stratospheric ozone is formed when diatomic oxygen absorbs an ultraviolet photon and is split into two free oxygen...

Do you ever order clothes online in different sizes and colors, just to try them on and then send back what doesn't work? Aparna Mehta used to do this all time, until she one day asked herself: Where do all these returned clothes go? In...

You've know that the Kepler Space Telescope has discovered HUNDREDS of new planets outside our solar system -- but how does it find them? And how do scientists tell the real planets from the celestial fake-outs? It involves a lot of...

Astronauts need to know their mass while in orbit, but a normal scale would be free-falling around the Earth with them. So how do they measure their mass without gravity?

Saturn’s rings, colored photography, and the discovery of electromagnetic waves all have have one thing in common. James Clerk Maxwell. Discover for yourself all the amazing contributions Maxwell made to science.

Lake Maracaibo is the stormiest place on the planet. Thunderstorms rage above this massive body of water for up to 200 days of the year, with each ear-splitting event lasting for several hours. But why? Graeme Anderson lists the factors...

Your closet is likely full of all kinds of materials -- leather, cotton, nylon and polyester, to name a few -- that contribute to fashion's sustainability crisis. Biomaterials investigator Dan Widmaier explains how we could look to...

Every day, tens of thousands of cargo ships, filled to the brim with goods, release heavy pollution into the air as they make their way across the ocean. In this eye-opening talk, reporter Maria Gallucci introduces a planet-friendly...

Water covers over 70% of the Earth, cycling from the oceans and rivers to the clouds and back again. It even makes up about 60% of our bodies. But in the rest of the solar system, liquid water is almost impossible to find. So how did our...

Conventional meat production causes harm to our environment and presents risks to global health, but people aren't going to eat less meat unless we give them alternatives that cost the same (or less) and that taste the same (or better)....

Hank talks about the issues of rising global population.

It's a big day for Jessi and Squeaks because they've finally finished their brand new observatory! Join them as they try out their new telescope and take a look back at a compilation of everything we've learned about space so far!

We’re all excited about the Mars rover Perseverance this week, but scientists are also working on some other exciting things!

Join SciShow Space as we explore Neptune's largest moon, Triton. It's kind of a weird place and may even have liquid water!

Despite water covering 71% of the planet’s surface, more than half the world’s population endures extreme water scarcity for at least one month a year. Current estimates predict that by 2040, up to 20 more countries could be...

Lighting up the TED stage, Nobel laureate Al Gore takes stock of the current state of climate progress and calls attention to institutions that have failed to honor their promises by continuing to pour money into polluting sectors. He...

In a word, "yes" - space is packed with gravity. Hank explains how Isaac Newton described how gravity works, and why even though it seems that things are floating in space, they're still effected by gravity. Every object in the universe...

There is an invisible shell of radiation surrounding our planet that can wipe out satellites and could endanger future explorers. One possible solution to this problem? Good, old-fashioned radio waves.

SciShow explains why stars do that twinkling that all the kids are singing about, and explains how astronomers can get around it to make observations, and why it can be kinda useful.

Marie Tharp's topographical maps increased our understanding of both the ocean floor and the processes that move the earth's crust.

In this video Paul Andersen explains how biodiversity measures the variety of genes, species, and ecosystems on the planet. Biodiversity provides resources and ecosystem services for humans on the planet. He also explains how...

If you go to the store in search of milk, there are a dizzying number of products to choose from. There's dairy milk, but also plant-based products such as almond, soy, and oat milks. So which milk is actually best for you? And which...

In the world of ecology, the only constant is change - but change can be good. Today Hank explains ecological succession and how ecological communities change over time to become beautiful, biodiverse mosaics.

In this video Paul Andersen explains how mining is used to extract valuable minerals from the Earth's crust. Surface and subsurface mining are used to extract ore which is then processed. A discussion of ecosystem impacts and...