SciShow
Cloudy With A Chance Of Aliens: How We Look for Extraterrestrial Life
2014 • E13 Jan 27, 2014 10m
What do astronomers look for when they study exoplanets for signs of alien life? Hank explains how space telescopes are already yielding tantalizing clues of what other worlds might hold -- including water! -- and how the next generation of technology will be able to reveal to us.