OCW
The gigantic forests you won’t find on land
Like any other plant, kelps require light to grow. Yet kelps found nearly 90 meters below the ocean's surface, where sometimes only 0.1% of sunlight can reach, grow as large as, and often even larger than, their shallow counterparts. So how have these large, light-dependent organisms adapted to..
TED
Why AI is an even bigger deal than you think
Netflix cofounder and Anthropic board member Reed Hastings joins TED's Sal Khan to give a look inside the race to build AI. Hear his take on how the technology could accelerate education — including the possibility of an AI tutor for every student — and reshape the economy faster than anyon..
TED
Why AI will never replace a great teacher
What's the most powerful tool in any classroom? In the age of AI, education advocate Matt Wu still believes it's the people. In this hopeful talk, he discusses the nonprofit he leads, Schoolhouse, which pairs students with peer tutors from across the globe, building the crucial human conne..
TED
When did we start using passports?
Passports are not the first form of travel documents: in Ancient Egypt, travelers carried “letters of safe conduct” issued by rulers; in Han China and Tudor England, foreigners were issued travel passes. However, for much of human history, borders have been relatively fluid, and travel lacked bu..
TED
The deadly threat affecting millions — and how to prevent it
Lead poisoning robs the world's kids of millions of IQ points a day and kills more people than wars, natural disasters and road accidents combined — yet we treat it as a problem we've already solved. Drew McCartor, who runs the nonprofit Pure Earth, has spent nearly two decades proving i..
TED
Beyond the Talk: Ann Patchett on reading, writing and the books she can’t put down
Novelist Ann Patchett joins Elise Hu, host of
TED
