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In this collection of classic MinuteEarth videos, we learn that for pretty much every action we humans take, there’s an unintended consequence we didn’t see coming.

There's nothing wrong with having your head in the clouds

Every spring, around 20% of the population enters the season of sniffles, and some years are worse than others. But lately, there just don’t seem to be any better years because the different effects of climate change seem to be working...

You probably don't think of active volcanoes as the ideal place to build a nursery, but for some animals, they're the perfect spot to incubate their unborn babies!

Not everyone gets a winter as cold (or at the same time) as we do at SciShow, but no matter where you live, you may have wondered why venturing out into the cold often makes you have to pee more often.

Jumping into a refreshingly cold body of water on a hot summer day can feel wonderful, except for your nose. Why does it hurt so much when you get water up your nose?

Exactly when and where did life on Earth begin? Scientists have long thought that it emerged three billion years ago in the ocean -- until astrobiologist Tara Djokic and her team made an unexpected discovery in the western Australian...

Negotiating thermostat settings can be really frustrating, but your officemate isn't trying to freeze you out on purpose. Stefan explains the science behind why people experience temperatures differently.

Fun fact: Stefan wears a...

From the spider in the corner of your house, to the moths in your attic, synanthropic species don't just live among us, they literally depend on us to live. Chapters View all synanthropic species 0:34 1 COMMON HOUSE SPIDERS 2:14 PURPLE...

Plants are amazing. Really! Photosynthesis is an incredible thing. But it also means that some plants can't live everywhere. They need to get the right amount of sunlight for the right amount of time. In this episode of Crash Course...

How can robots learn to stabilize on rough terrain, walk upside down, do gymnastic maneuvers in air and run into walls without harming themselves? Robert Full takes a look at the incredible body of the cockroach to show what it can teach...

Jessi got so cold outside that she got goosebumps! Join her and Squeaks as they learn what causes your body to make these bumps in the first place.

Learn some curious facts about the majestic manatee.

Sure, honeybees make delicious honey. But have you ever heard of propolis, the spitty glue they use to mummify intruders?

You'd think that air that was the same temperature as your body would feel neutral, but if you've ever been outside when it's 37 degrees Celsius out... you know that's not the case!

In 1986, a prospecting crew in southern Romania was looking for a good place to build a geothermal power plant, when they accidentally discovered one of the oddest caves of all

Around 500 Million years ago, Earth’s climate was warm, and the planet had nearly no ice, even at the poles. Then an asteroid broke apart deep in our solar system, and our planet plunged into an ice age at the same time. Are the two...

In the developing world, access to incubators is limited by cost and distance, and millions of premature babies die each year. TED Fellow Jane Chen shows an invention that could keep millions of these infants warm -- a design that's...

That terrible pain the befalls us when enjoying an icy treat! How does that happen? Is there a cure? Let Hank explain.

Hang Sơn Đoòng in Phong Nha-Kẻ Bàng National Park is the largest known cave in the world, big enough to have its own jungles, weather, and... pearls?

The new breed of high-tech self-monitors (measuring heartrate, sleep, steps per day) might seem targeted at competitive athletes. But Talithia Williams, a statistician, makes a compelling case that all of us should be measuring and...

Feathers might have originated tens of millions of years before we'd thought, and a 3D rendering of ankylosaur nasal passages lends new insight into how they stayed cool.

Army ants move around a lot, which means they can't build a nest like other ants do. So, to build their shelters, they came up with another, way weirder solution...