How a miniaturized atomic clock could revolut...

Does the fix for a fragmented world begin with a shared bookshelf? Photographer Rebecca Toh traces how she joined with 180 other people to build a community-funded library where strangers rent shelves, fill them with their personal collections and forge something rare: real conne ...  Afficher plus

By 2030, nearly half the world's young people will be African. Yet for decades, the continent's learning crisis was treated with systems unfit for reality on the ground. Social entrepreneur Rapelang Rabana shows how homegrown leadership and technology designed for African classro ...  Afficher plus

Jill Seubert is a deep space navigator who shares the intricacies involved in space travel. This talk was filmed at TEDxUCLA. All TEDx events are organized independently by volunteers in the spirit of TED's mission of ideas worth spreading. To learn more about TEDxSHORTS, the TED ...  Afficher plus

Dr. Jill Seubert is a kind of interplanetary navigator who looks at the complex ways scientists measure space time. This talk was filmed at TEDxUCLA. All TEDx events are organized independently by volunteers in the spirit of TED's mission of ideas worth spreading. To learn more a ...  Afficher plus

Listener Terje wants to know about space navigation. We look at how orbital velocities, special and general relativity and even stuff like solar radiation can make navigating from point A to point B a big head scratcher once you go into space. Learn more about your ad-choices at ...  Afficher plus

In this episode:00:46 Optical clocks at seaOptical atomic clocks are the most precise timekeeping devices on the planet, but these devices are huge and difficult to work with, limiting their use outside of the lab. Now, researchers have developed a portable optical clock and demo ...  Afficher plus