Sunscreen comes in different levels of SPF, or sun protection factor, but what does that mean for your skin and the ultraviolet radiation hitting it? Olivia explains the science of SPF.

The way we experience seasons don't necessarily line up with how they're technically defined - here's why.

Like Egypt, Sumer, and Mesoamerica, ancient China represents a hydraulic civilization—one that maintained its population by diverting rivers to aid in irrigation—and one that developed writing thousands of years ago. Today, we’re going...

A new strain of bird flu has been detected in North American birds for the first time in seven years. And U.S. President Biden is temporarily lifting the country's summertime ban on E15 gasoline.

Why The Full Moon is Better in Winter

2020 is going to be an exciting year for space exploration, if everything goes according to plan. Humans are heading to space in new spacecraft, multiple Mars missions are on the horizon, and scientists are getting a new perspective on...

Reed Kroloff gives us a new lens for judging new architecture: is it modern, or is it romantic? Look for glorious images from two leading practices -- and a blistering critique of the 9/11 planning process.

Believe it or not, about 20 years' worth of potentially life-saving drugs are sitting in labs right now, untested. Why? Because they can't get the funding to go to trials; the financial risk is too high. Roger Stein is a finance guy, and...

Children's book author Jarrett Krosoczka shares the origins of the Lunch Lady graphic novel series, in which undercover school heroes serve lunch...and justice! His new project, School Lunch Hero Day, reveals how cafeteria lunch staff...

In today's world, balancing school, work, kids and more, most of us can only hope for the recommended eight hours of sleep. Examining the science behind our body's internal clock, Jessa Gamble reveals the surprising and substantial...

There are lots of reasons stinky things don’t smell as strong in cold weather. You can maybe guess some of the reasons, but others may surprise you!

What’s a mosquito’s favorite color? #shorts #science #SciShow

The leaves are falling from the trees and the air is getting chilly where Jessi and Squeaks live, which can only mean one thing: it's fall! And to celebrate the season, they've put together a bunch of videos about all the fun things you...

SciShow Space News tells you about NASA's latest launch -- the first mission dedicated to measuring carbon dioxide in the atmosphere -- and gives you a primer on what the June solstice really is!

For 13 years, the Cassini probe circled Saturn and sent back fascinating data about the seasons of Saturn as it moved through a 29 Earth year Saturnian year.

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. As the director of the Metropolitan Museum of Art in New York, Thomas P. Campbell thinks deeply about curating—not...

With his team at SENSEable City Lab, MIT's Carlo Ratti makes cool things by sensing the data we create. He pulls from passive data sets -- like the calls we make, the garbage we throw away -- to create surprising visualizations of city...

Land thrives in Indigenous hands, and there are real, tangible ways you can help return what was stolen by colonizers from tribes across North America. Indigenous scholar Lindsey Schneider addresses the ill-gotten legacy of settler...

During the age of dinosaurs, a massive asteroid slammed into the Earth, bringing an end to most life at the time. And thanks to new fossil evidence, we've been able to pinpoint a time of year for this event that happened millions of...

America was built by makers -- curious, enthusiastic amateur inventors whose tinkering habit sparked whole new industries. At TED@MotorCity, MAKE magazine publisher Dale Dougherty says we're all makers at heart, and shows cool new tools...

Joseph Gordon-Levitt has gotten more than his fair share of attention from his acting career. But as social media exploded over the past decade, he got addicted like the rest of us -- trying to gain followers and likes only to be left...

Singer/songwriter Eddi Reader performs "Kiteflyer's Hill," a tender look back at a lost love. With Thomas Dolby on piano.

In the 13th century, Genghis Khan embarked on a mission to take over Eurasia, swiftly conquering countries and drawing them into his empire. But, legend has it that there was one obstacle that even he couldn't overcome: a towering wall...

We're living in a brief window of time where our planet isn't frozen underneath a giant layer of glaciers. How much longer will the moderate climate that we've come to know as "normal" continue? This episode looks at how the changes in...