What makes up the universe? Lots of tiny particles with strange names: bosons, leptons, quarks and neutrinos. But physicists think there are more members to be discovered in this particle zoo.
From strange particles to dark matter to vibrating strings, find out why you have to think small to understand the physics of the universe.
Plus, other cosmic connections: is SETI a religion?
- Murray Gell-Mann - Physics Nobel Laureate, Professor Emeritus - California Institute of Technology, Distinguished Fellow at the Santa Fe Institute, Santa Fe, New Mexico
- Brian Greene - Mathematician and physicist, Columbia University, author of The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory and, most recently, Icarus at the Edge of Time
- Lisa Randall - Physicist, Harvard University, author of Warped Passages: Unraveling the Mysteries of the Universe's Hidden Dimensions
- David Wilkinson - Theologian, University of Durham, U.K.