In this fiery and funny talk, New York Times food writer Mark Bittman weighs in on what's wrong with the way we eat now (too much meat, too few plants; too much fast food, too little home cooking), and why it's putting the entire planet at risk.

Alisa Miller, head of Public Radio International, talks about why -- though we want to know more about the world than ever -- the US media is actually showing less. Eye-opening stats and graphs.

Hacker and writer Joshua Klein is fascinated by crows. (Notice the gleam of intelligence in their little black eyes?) After a long amateur study of corvid behavior, he's come up with an elegant little machine that may form a new bond between animal and hu

Michael Moschen puts on a quietly mesmerizing show of juggling. Don't think juggling is an art? You might just change your mind after watching Moschen in motion.

Evolutionary biologist Paul Ewald drags us into the sewer to discuss germs. Why are some more harmful than others? How could we make the harmful ones benign? Searching for answers, he examines a disgusting, fascinating case: diarrhea.

Mycologist Paul Stamets studies mycelium and lists 6 ways that this astonishing fungus can help save the universe. Cleaning polluted soil, creating new insecticides, treating smallpox and maybe even the flu ... in 18 minutes, he doesn't get all the way through his list, but he has plenty of time to blow your mind. An audience favorite at TED2008.

Mycologist Paul Stamets studies the mycelium -- and lists 6 ways that this astonishing fungus can help save the world.

Hector Ruiz talks about his commitment to giving the whole world access to the Internet. Ruiz is the CEO of AMD, and through AMD's 50x15 initiative, Ruiz and his company hope to connect 50 percent of the world to the Internet by 2015. Sharing his own extraordinary life story, Ruiz makes the case that access to education is life-changing.

In a very, very early-morning set, They Might Be Giants rock the final day of TED2007. Songs include "Older," "Bee of the Bird of the Moth," "Asbury Park," "Fingertips," the premiere of "Phone Calls from the Dead," and "Alphabet of Nations.

"Rock star physicist" Brian Cox talks about his work on the Large Hadron Collider at CERN. Discussing the biggest of big science in an engaging, accessible way, Cox brings us along on a tour of the massive complex and describes his part in it -- and the vital role it's going to play in understanding our universe.