How can we disagree with one another, respectfully and productively? In this thoughtful talk, team builder Matt Trombley reflects on "agonism" -- the tendency to take a rigid stance on issues -- and shares why finding aspects of...

If you’ve ever eaten it, you’ve probably noticed how flaky fish can be. Poke at it with your fork and it just falls apart — no knife required. What makes fish different from other animal protein?

Today from SciShow World News Headquarters (Hank's office) - news about radiation risks, the most hi-def astronomy ever, and the truth about aquatic humanoids.

SciShow Talk Show: where Hank talks to interesting people about interesting things! In this episode Hank and Collections Manager Kallie Moore talk ancient life, careers in science, and dragons.

The legal system can seem like a complicated tangle of arcane rules and loopholes, and it can sometimes seem like it is designed to confuse. But it is possible, with the right application, for the legal system to rectify injustices....

Over the past few centuries, Western cultures have been very good at creating general prosperity for themselves. Historian Niall Ferguson asks: Why the West, and less so the rest? He suggests half a dozen big ideas from Western culture...

A volcanic eruption and series of earthquakes in 2005 were important not because they did a great deal of damage to humans, but because they’re geologic evidence of where Earth’s next ocean will most likely pop up.

The people of Palau -- a pristine ocean state made up of more than 300 islands in the western Pacific -- warmly welcome travelers to their home every year. But the guests don't always know how to protect the country's beautiful beaches...

What do you learn when you sail around the world on your own? When solo sailor Ellen MacArthur circled the globe – carrying everything she needed with her – she came back with new insight into the way the world works, as a place of...

Between 1840 and 1914, an estimated 40 million people left Europe. This is one of the most significant migrations in human history. So, who was leaving Europe? And why? Crash Course is on Patreon! You can support us directly by signing...

As the sun rises in 55 BCE, Camma lays two pigeons on the altar at the center of her village. She wrings the birds' necks and cuts them open to examine their entrails for divine messages. Camma is a druid. She conducts religious rites,...

In the early days of spaceflight, if NASA needed to plot a rocket's path or confirm a computer's calculations, they knew who to ask: Katherine Johnson.

The #OursToLose YouTube campaign sheds light on climate change and the environment.

It's been a year since astronomer Tabetha Boyaijan found strange signals coming from a star called KIC 8462852, aka Tabby's Star. Now, new research shows that it's even stranger than we thought. Plus, good news from spaceflight company...

As manager of the Rosetta mission, Fred Jansen was responsible for the successful 2014 landing of a probe on the comet known as 67P/Churyumov-Gerasimenko. In this fascinating and funny talk, Jansen reveals some of the intricate...

Switching from beef to a specific kind of vegetarian protein just once a week could have huge environmental benefits, according to a study out this week in Nature. And, in a study in Nature Communications, researchers in the US have...

From problems with the moon, to the lumpiness of earth, sea levels aren't quite as exact as we have them figured out to be.

Although polar bears and grizzly bears aren't all that similar and are definitely separate species, they can interbreed and create fertile offspring in the wild. Hank brings us the story of these misfit bears, which he likes to call...

In which John asks whether globalization is a net positive for humanity. While the new global economy has created a lot of wealth, and lifted a lot of people out of poverty, it also has some effects that aren't so hot. Wealth disparity,...

We’ve sent more spacecraft to Mars than any other planet, but around half of the probes that have ever attempted to explore Mars have either crashed or disappeared.

There is a corruption at the heart of American politics, caused by the dependence of Congressional candidates on funding from the tiniest percentage of citizens. That's the argument at the core of this blistering talk by legal scholar...

With her gorgeous, haunting photographs, artist uldus Bakhtiozina documents dreams, working with daily life as she imagines it could be. She creates everything in her work by hand -- from costumes to stages -- without digital...

This week SpaceX accomplished a first in the history of spaceflight: They reused a rocket big enough to send things into orbit!

The dwarves were master craftspeople. One dwarf, Andvari, forged marvelous creations. He often took the form of a fish and, one day, he swam to the land of the water nymphs, who guarded mounds of gold. When the nymphs laughed at his...