Explore how to use a light microscope with the Amoeba Sisters! Includes microscope parts, how to use, and some helpful tips! Additionally, this video introduces a few types of light microscopes as well as electron microscopes. Expand...

Cameron Russell admits she won "a genetic lottery": she's tall, pretty and an underwear model. But don't judge her by her looks. In this fearless talk, she takes a wry look at the industry that had her looking highly seductive at barely...

We generally think of pregnancy as a continuous process, but scientists have recently discovered mechanisms that allow for certain mammals to put the development of a fetus on pause.

After the Lumiere brothers and Thomas Edison got the ball rolling with Vaudeville acts and Actualites, the time was coming for movie magic and fiction to make an appearance. The time was coming of filmmakers like Georges Melies and Alice...

Preventing heartworm disease in your dog isn't just good for your furry friend. It turns out that humans can be infected with heartworm, too!

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences.

The way we're taught to live has got to change, says author Casey Gerald. Too often, we hide parts of...

We've found the first evidence of planets outside of the Milky Way, and SpaceX has finally launched the Falcon Heavy rocket into space!

Humanity's fine-tuned sense of fear served us well as a young species, giving us laser focus to avoid being eaten by competing beasts. But it's less wonderful when that same visceral, body-hijacking sense of fear kicks in in front of 20...

The Apollo 11 mission had many opportunities for things to go awry, and they almost did! Find out how a felt-tipped pen may have saved the lives of the first astronauts on the moon, and more!

What's the best way to get over heartbreak? Rapper and writer Dessa came up with an unconventional approach after a chance viewing of Helen Fisher's TED Talk about the brains of the lovestruck. In a wryly funny talk, she describes how...

Mumbling fantastical gibberish; devouring blocks of cheese in the nude; peeing in places that aren't toilets; and jumping out of windows. These are all things people have reportedly done while sleepwalking, a behavior that can be...

Remember the days you struggled just to make a yo-yo spin, and if you were really fancy, to “walk the dog”? You ain’t seen nothin’ yet. Japanese yo-yo world champion BLACK tells the inspiring story of finding his life's passion, and...

In a brilliantly tongue-in-cheek analysis, Sebastian Wernicke turns the tools of statistical analysis on TEDTalks, to come up with a metric for creating "the optimum TEDTalk" based on user ratings. How do you rate it? "Jaw-dropping"?...

Throughout this series we’ve mostly talked about pairs of electrons, but electrons don’t always have a buddy. An atom or group of atoms with a single unpaired electron is called a radical. In this episode of Crash Course Organic...

50 to 70 million people are thought to have some kind of sleeping disorder. If you're one of those people, desperate for a good night's sleep, scientists may have an option for you: rocking!

Ever wonder how that guitarist nailed that solo or how your favorite rapper can roll out so many lyrics while making it look easy? Beside lots of practice, your brain has a few tricks.

There's a play so powerful that an old superstition says its name should never be uttered in a theater. A play that begins with witchcraft and ends with a bloody, severed head. A play filled with riddles, prophecies, nightmare visions,...

Everyone has dreams, but some people are better at remembering them than others. Scientists aren't sure why we dream, but remembering them has a lot to do with the activity in your brain, and with how well you sleep.

Have you ever read Harry Potter and wished that you were a student at Hogwarts, studying magic with Harry, Ron, and Hermione? Well, your wish might have partially come true, without you knowing it.

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Fossil fuels are made from the remains of extinct organisms that have been exposed to millions of years of heat and pressure. But in the case of coal, these organisms consisted largely of some downright bizarre plants that once covered...

Starting in 80 CE, residents of Rome and visitors from across the Roman Empire would fill the stands of the Colosseum to see gladiators duel, animals fight and chariots race around the arena. And for the grand finale, water poured into...

At age 14, in poverty and famine, a Malawian boy built a windmill to power his family's home. Now at 22, William Kamkwamba, who speaks at TED, here, for the second time, shares in his own words the moving tale of invention that changed...

Daniel Kish has been blind since he was 13 months old, but has learned to "see" using a form of echolocation. He clicks his tongue and sends out flashes of sound that bounce off surfaces in the environment and return to him, helping him...