In this video Paul Andersen explains how electromagnetic forces are exerted over all scales and dominate at the human scale. The magnitude of electromagnetic forces vary with the magnitude and motion of the electric charges involved.

Why are all the gas stations, cafes and restaurants in one crowded spot? As two competitive cousins vie for ice-cream-selling domination on one small beach, discover how game theory and the Nash Equilibrium inform these retail hotspots.

Sloths spend most of their time eating, resting, or sleeping; in fact, they descend from their treetops canopies just once a week, for a bathroom break. How are these creatures so low energy? Kenny Coogan describes the physical and...

A new paper that borrows old astrological data from the Voyager 2 probe has used brand-new computer simulations to find some new weird data about Uranus’s magnetic field. Another paper has new information about our galaxy’s fastest...

Baritone thunder. Snarling winds. Consuming downpours. Okeechobee, the hurricane of 1928, forced many to flee their ruined communities. But for Janie Crawford, it inspired an unexpected homecoming. So begins Zora Neale Hurston's...

Composer and conductor Eric Whitacre has inspired millions by bringing together "virtual choirs," singers from many countries spliced together on video. Now, for the first time ever, he creates the experience in real time, as 32 singers...

There's an Eclipse coming on August 21st, and Jessi and Squeaks are PUMPED! Today, they'll show you where in the world you'll be able to see the eclipse, what happens during an eclipse, and tell you how you can watch the eclipse safely!

An incredibly bright burst of energy and a dent covered with ice give us insights into planetary and universal structure.

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...

It's getting really cold where Jessi and Squeaks live, and that has her thinking about a super cool animal that's always ready for super cold weather: Reindeer!

Got milk? Fact is, most people don't -- and shouldn't -- because for them, ice cream and milkshakes are basically toxic. So why can some people drink milk and survive? Turns out they're mutants! SciShow explains.

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...

Hank debunks several apocalypse theories that predict Earth's demise in 2012.

Why Does Earth Have Deserts? For the same reason it has Rainforests: Hadley Cells!!!

Jupiter's storms cover the planet, but the ones at the planet’s poles have mystified astronomers for years: why haven’t they merged together yet?

Why is my weather app sometimes wrong? Well it has a lot to do with wind. Jet Streams, air cells, the shape and movement of the Earth... there are a lot of things that make weather a little unpredictable. In this episode of Crash Course...

Earth's ocean water is continuous. How can we divide it into sections that are more useful?

Paul Andersen explains how objects interact when touching and at a distance. Electromagnetic forces are very important when objects are touching and fields explain both electromagnetic and gravitational forces. The strong and weak...

Both North and South America have their own species of marsupial, the opossum, but how they got so far away from their Australian relatives is a bit of a mystery.

When it comes to tackling climate change, the size of a country doesn't matter -- it's their ambition that counts, says First Minister of Scotland Nicola Sturgeon. In a rousing talk, she shares examples of small nations -- from Bhutan...

Escaping slavery; risking everything to save her family; leading a military raid; championing the cause of women's suffrage; these are just a handful of the accomplishments of one of America's most courageous heroes. Janell Hobson...

In which John Green teaches you about the Cold War as it unfolded in Asia. As John pointed out last week, the Cold War was occasionally hot, and a lot of that heat was generated in Asia. This is starting to sound weird with the hot/cold...

It’s the dream of kids all around the world to see giant beasts walk the Earth again. Could -- and should -- that dream be realized? Hendrik Poinar talks about the next big thing: the quest to engineer a creature that looks very much...

Rubber ducks aren’t just good for some bath time fun, they’ve also helped scientists learn about the world!