Hank describes some of the best explanations that neurologists have come up with to account for the strange sensation we know as déjà vu.

As we move through the world, we have an innate sense of how things feel -- the sensations they produce on our skin and how our bodies orient to them. Can technology leverage this? In this fun, fascinating TED-Ed lesson, learn about the...

We have archives of films, newspapers, even seeds -- what if we could make one for the entire surface of the earth? Drawing on his experience mapping an ancient city in the Honduran jungle, archaeologist Chris Fisher makes the case for...

Subtle motion happens around us all the time, including tiny vibrations caused by sound. New technology shows that we can pick up on these vibrations and actually re-create sound and conversations just from a video of a seemingly still...

In this video Paul Andersen explains how the angular momentum of an object if a product of the rotational inertia and the angular velocity. The rotational inertia depends on the mass, radius and shape of the rotating objects. A sample...

There are so many tiny, beautiful, funny, tragic moments in your life -- how are you going to remember them all? Director Cesar Kuriyama shoots one second of video every day as part of an ongoing project to collect all the special bits...

Mieux connaître la pollution de l’air pour mieux s’en protéger.



Afin de mieux comprendre la pollution de l’air et donc s’en protéger, 2018 TED Fellow, Romain Lacombe a développé une application mobile qui agrège des...

Which is the most intense Olympic throwing event? Shot put? Hammer? Discus? Javelin?

Say hello to the decentralized economy -- the blockchain is about to change everything. In this lucid explainer of the complex (and confusing) technology, Bettina Warburg describes how the blockchain will eliminate the need for...

Over 2,500 years ago, one of ancient Greece's most celebrated popstars and erotic poets enraptured listeners. The singer-songwriter offered a uniquely intimate perspective on love, passion, and longing, and was the first on record to...

Hank gives a quick run-down of the reasons scientists think the land mammals of today are nowhere near the size of the largest sauropods. Some of them might surprise you!

Singer/guitarist Raúl Midón performs "All the Answers" in a world premiere at TED2007, followed by the sprightly "Tembererana."

In this collection of classic MinuteEarth videos, we answer the question "why are you the way that you are?"

By dissecting a cockroach ... yes, live on stage ... TED Fellow and neuroscientist Greg Gage shows how brains receive and deliver electric impulses -- and how legs can respond. (Launching a series on Awesome Nature) "The Cockroach...

Why do exams always tell you to use a number 2 pencil? What happens if you don't? Quick Questions explains!

Hank gets all up in your face about kissing -- where does it come from, why do it we do it, and do other animals do it? From ancient India to that date you were on last night (which we won't tell anyone about if you won't), we explore...

We can learn a lot about our galaxy by looking to the stars, but we can also reveal a lot about our cosmic history from... Dead trees?

The human lifespan might be limited, in part, because natural selection just stops working late in life.

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Mortality plateau: the...

Natural history is full of living things that were long thought to have gone extinct only to show up again, alive and well. Paleontologists have a word for these kinds of organisms: They call them Lazarus taxa.

Caves are fascinating, but these ones are some of the most fascinating, both in and out of this world.

If you're anything like us, you're always investigating and asking questions about the world around you! Keeping a field journal is a great way to keep track of all the ideas and observations you have every day!

How does music shape us? Digital ethnomusicologist and TED Fellow Kyra Gaunt studies how Black girls can preserve the integrity of their own voices while listening, dancing and singing to pop songs largely engineered by men, often with...

Fire seasons can be bad enough on their own, but it turns out sometimes forest fires that appeared to be dead, turn out to have just been lying in wait.

Hank gets to the bottom of two studies reporting high sea ice coverage and snowmass in Antarctica in the same year that the Arctic has reported a record low of sea ice. What is going on here?