TED-Ed: Lessons Worth Sharing

Ever go to pour ketchup on your fries...and nothing comes out? Or the opposite happens, and your plate is suddenly swimming in a sea of red? George Zaidan describes the physics behind this frustrating...

Water is essentially everywhere in our world, and the average human is composed of between 55 and 60% water. So what role does water play in our bodies, and how much do we actually need to drink to st...

Beginning around 1377, medieval England was shaken by a power struggle between two noble families, which spanned generations and involved a massive cast of characters, complex motives and shifting loy...

When you take a bite of a hot pepper, your body reacts as if your mouth is on fire -- because that's essentially what you've told your brain! Rose Eveleth details the science and history behind spicy ...

Loki the mischief-maker, writhes in Thor's iron grip. The previous night, he'd snuck up on Thor's wife and shorn off her beautiful hair. To fix what he'd done, Loki rushes to the dwarves and tricks th...

In ancient times, wildcats were fierce carnivorous hunters. And unlike dogs, who have undergone centuries of selective breeding, modern cats are genetically very similar to ancient cats. How did these...

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...

Kurt Vonnegut found the tidy, satisfying arcs of many stories at odds with reality, and he set out to explore the ambiguity between good and bad fortune in his own novels. He tried to make sense of hu...

The earliest time measurements were observations of cycles of the natural world, using patterns of changes from day to night and season to season to build calendars. More precise time-keeping eventual...

Cigarettes aren't good for us. That's hardly news -- we've known about the dangers of smoking for decades. But how exactly do cigarettes harm us, and can our bodies recover if we stop? Krishna Sudhir ...