In the span of a single lifetime, the world has moved from the Model T to supersonic jets, from AM radios to digital cameras, from outer space to cyberspace. Now you can join the editors of TIME as they bring together the 100 most significant and compelling discoveries of our time, from Einstein's theory of relativity...to the deciphering of the double helix of DNA...to the cloning of Dolly the Sheep. You'll marvel at the treasures of King Tut's tomb, walk with archaeologists into long-lost Macchu Picchu, and explore the depths of the ocean with Jacques Costeau. You'll witness the first nuclear chain reaction, travel with polar explorers to the ends of the earth, and gaze in awe at the wonders of space only recently revealed by the Hubble Telescope. Filled with hundreds of awe-inspiring photographs and profiles of the world's greatest inventors and explorers, TIME: 100 GREATEST DISCOVERIES AND INVENTIONS invites you to rediscover the wonder of mankind's greatest discoveries.