Artist Rachel Sussman is obsessed with very old things that are still alive. No, not certain members of the British aristocracy. Things like the Pafuri baobab, a South African tree that is likely at least 2,000 years old -- and requires an armed guard escort to visit. Or the stromatolites of Western Australia, organisms connected to the oxygenat...

Richard Turere, 13, grew up hating lions. In Nairobi National Park, where he lives, lions roam freely and often targeted his family’s livestock at night. And yet Turere also hated the only solution his community had come up with to stop lion attacks on cows -- killing the majestic creatures. “I had to find a way of solving this problem,” says...

On a typical sunny day in the Amazon, 20 billion metric tons of water flow upward through the trees and pour into the air, an invisible river that flows through the sky across a continent.  “This river of vapor that comes up from the forest and goes into the atmosphere is greater than the Amazon River," says Antonio Donato Nobre (TED Talk: The ...

Across the globe, anyone can watch TED Talks through TED.com, our YouTube channel, our mobile apps or our iTunes podcasts. (Have you checked out TED Studies on iTunes U?) Most recently, our new SmartTV app showcases TED in beautiful high definition through television set manufacturers like Samsung and telephone IPTV providers like TELUS, letting...

In this session, "Lenses," speakers look through cameras and new lenses -- at subjects from the very, very big to the very, very small to the very, very far away. Wendy Freedman talks about a remote location in the Andes, far from the lights of civilization, where the stars can be seen clearly with the naked eye. In that location, by the ...

It's time to nominate someone for the 2015 TED Prize, a $1 million award to a visionary with a great big idea for creating change in the world. Through Monday, March 31, you can nominate a mentor, a hero, a co-worker, even yourself. TED is looking for someone who has not only a great wish, but a track record that suggests they could accompli...

In 2012, the TED Prize was awarded to an idea: The City2.0, a place to celebrate actions taken by citizens around the world to make their cities more livable, beautiful and sustainable. This week, The City2.0 website evolves. On the relaunched TEDCity2.org, you’ll find great talks on topics like housing, education and food, and how they relate t...

Want to take pictures that will make people gasp? Photographer David Yarrow shares his advice on how to avoid the played-out and zoom in on the unexpected. Over his 30-plus years in photography, David Yarrow (TEDxEton Talk: Wild Encounters--the story of what I do differently) has waded through the crocodile-infested Nile, taken a selfie reflect...

“The politics of joy” is a phrase that resonates through this session of TED Fellows talks. These talks, by and large, come from people who’ve taken a hard look at the world and its problems and decided to engage joyfully, with creativity, fresh insight and heart. From a soccer project that empowers young refugees, to an SMS service for cow ...

Jimmy Nelson has gone all over the earth to photograph native peoples at their proudest moments and to show you their soul. “This is us at our best” -- that’s the caption that could hover over these images from Dutch photographer Jimmy Nelson (TED talk: Gorgeous portraits of the world’s vanishing people), who works to put the world’s peoples an...

Nigerian-American Nnedi Okorafor writes the kind of drop-everything, Africa-based fantasy and sci-fi that she never saw on bookshelves growing up. Here, she talks about the authors that shaped her, her inspirations (traffic! jellyfish!) and her collaboration with Marvel. Nnedi Okorafor is obsessed with bugs. More specifically grasshoppers, but ...