Bernie Krause has been recording wild soundscapes -- the wind in the trees, the chirping of birds, the subtle sounds of insect larvae -- for 45 years. In that time, he has seen many environments radically altered by humans, sometimes even by practices thought to be environmentally safe. A surprising look at what we can learn through nature's sym...

How do we grasp the individual humanity of millions of displaced people? Artist, author and photographer Brian Sokol has been trying to do this from behind a lens, documenting refugee camps and engaging with people who live in them. He shares how disrupting incomplete narratives and letting refugees tell their own stories changed his own preconc...

The photo director for National Geographic, David Griffin knows the power of photography to connect us to our world. In a talk filled with glorious images, he talks about how we all use photos to tell our stories.

Is there a definitive line that divides crazy from sane? With a hair-raising delivery, Jon Ronson, author of The Psychopath Test, illuminates the gray areas between the two. (With live-mixed sound by Julian Treasure and animation by Evan Grant.)

Joe Gebbia, the co-founder of Airbnb, bet his whole company on the belief that people can trust each other enough to stay in one another's homes. How did he overcome the stranger-danger bias? Through good design. Now, 123 million hosted nights (and counting) later, Gebbia sets out his dream for a culture of sharing in which design helps foster c...

Journalist Misha Glenny spent several years in a courageous investigation of organized crime networks, which have grown to an estimated 15% of the global economy. From the Russian mafia to the giant drug cartels, his sources include not just intelligence and law enforcement officials but criminal insiders.

Debbie Millman talks to author Cheryl Strayed about her childhood, career and the value of taking a very long hike. Listen and subscribe to Design Matters with Debbie Millman and more podcasts from the TED Audio Collective at audiocollective.ted.com.

Brian Cross, director of professional services at ESRI, talks about passion and purpose.

What do dinosaurs, hens, and robots have in common? Bruno Grossi is a biologist and he tells us through his ingenious experiments how he's contributing to biology while developing innovative technologies based on nature. Bruno is a biomechanist: he's interested in know how things move -- current animals, dinosaurs, robots. Movement is a serious ...