Armed with a sense of humor and laypeople's terms, Nobel winner Murray Gell-Mann drops some knowledge on TEDsters about particle physics, asking questions like, Are elegant equations more likely to be right than inelegant ones?

After speaking at TED2007 on elegance in physics, the amazing Murray Gell-Mann gives a quick overview of another passionate interest: finding the common ancestry of our modern languages.

Two TED favorites, Jill Sobule and Julia Sweeney, team up for a delightful set that mixes witty songwriting with a little bit of social commentary.

With all the intensity and brilliance for which he is known, Alan Kay envisions better techniques for teaching kids by using computers to illustrate experience in ways -– mathematically and scientifically -- that only computers can.

Physicist and surfer Garrett Lisi presents a controversial new model of the universe that -- just maybe -- answers all the big questions. If nothing else, it's the most beautiful 8-dimensional model of elementary particles and forces you've ever seen.