In his TED talk, SETI researcher Seth Shostak bets that humans will find extraterrestrial life in the next twenty-four years, or he’ll buy you a cup of coffee. At TEDxSanJoseCA, he explains why new technologies and the laws of probability make the breakthrough so likely — and forecasts how the discovery of civilizations far more advanced than ours might affect us here on Earth. Seth Shostak is known as an astronomer, alien hunter and bulwark of good, exciting science.