If the earth is spinning to the east at 1000 miles per hour... why can't we fly west more easily?

An oblate spheroid is a special case of an ellipsoid where two of the semi-principal axes are the same size.

The basic physics behind how rockets work!

TOP 10 REASONS Why We Know the Earth is Round

Is the Universe Entirely Mathematical feat. Max Tegmark

Is it Better to Walk or Run in the Rain

What is matter, anyway? What does it have to do with math? And why aren't you made of Jesus? Delving deeper into the theory of (almost) everything - the Standard Model of particle physics.

Denizens of the Deep

Immovable Object vs. Unstoppable Force - Which Wins

"Some infinities are bigger than other infinities" - Hazel Grace Lancaster, in "The Fault in Our Stars," by John Green

How Long Can You Balance a Pencil

This video is about the orbital mechanics of why it's so hard to crash into the sun - the energy it takes to get there is astoundingly high, compared with leaving the solar system.

In which we explain economic equilibrium, how to make money from nothing, and every fundamental force in physics.

Evolution vs Natural Selection

Guns in Space

If you think it's cold outside where you are, you should try living in the coldest place on Earth: Antarctica! Learn why it's a desert even though it's very cold, and about awesome animals like seals and penguins.

Join Squeaks and Jessi as they learn about a time when lots of animals switched places -- like bears, sloths, armadillos, and more.

Squeaks, Jessi, and the gang are all going on vacation to the lake, but there's a problem. Our friend Juniper needs a boat, and ours is missing! Jessi proposes we think like engineers and gather information to find a way to solve our...

Freada Kapor Klein isn't your typical venture capitalist. She's thrown out the standard investment playbook in order to close the opportunity gap for low-income communities. She explains how her firm is investing in entrepreneurs and...

When it comes to climate, what are we doing right and where should we focus our efforts next? Systems innovator Ryan Panchadsaram and strategist Anjali Grover talk with TED science curator David Biello about the latest on the world's...

No one truly understands AI, not even experts, says Helen Toner, an AI policy researcher and former board member of OpenAI. But that doesn't mean we can't govern it. She shows how we can make smart policies to regulate this technology...

The convergence of AI and robotics will unlock a wonderful new world of possibilities in everyday life, says robotics and AI pioneer Daniela Rus. Diving into the way machines think, she reveals how "liquid networks" — a revolutionary...

Collaboration in the workplace is more important than ever -- but it's making us less productive in some ways. Here's what collaboration pioneer Rob Cross says is driving us to take on way too much -- and how we can reclaim our time and...