The year 2001 marked more than just the beginning of Stanley Kubrick's Space Odyssey, it marked the beginning of the genome era. That was the year scientists first read the 3 billion letters of DNA that make up the human genome. This was followed by a veritable Noah's Ark of genomes--sponges and worms, dogs and cows, rice and wheat, chimps and elephants--180 creatures aboard so far. So what have we learned from all this? How has it changed...