Countdown is a global initiative, powered by TED and Future Stewards, to accelerate solutions to the climate crisis. The goal: to build a better future by cutting greenhouse gas emissions in half by 2030 towards reaching net zero by 2050. It was launched October 10, 2020 with the Countdown Global Launch, a virtual event featuring five curated se...

Welcome to the global archive of TED Talks! To dive in, start with these popular talks.

As we celebrate the end of 2020 ... what captured our imaginations, reflected our emotions and sparked hope for a better tomorrow? Here's a wide-ranging list of the talks that stayed with us this year (along with some hidden gems), selected by the editorial team at TED.

A smorgasbord of inspired TED Talks to help you get through your funk, and answer some deeper questions along the way.

Fascinating talks that seek to unravel some of the most fundamental, yet unexplainable parts of the cosmos.

The answer is satellites, stars, planets, asteroids and maybe even aliens.

Find out what sound a black hole makes, if (possible) alien life is blocking starlight and other astounding things happening in our galaxy -- and beyond.