Quick facts about aliens
Has extraterrestrial life been discovered?: Not yet!
Where are scientists looking for aliens?: Water-rich bodies in our solar system, like Jupiter's moon Europa, and Earth-like exoplanets — planets outside our solar system
How many planets in the Milky Way have the right conditions for life? An estimated 300 million
E.T., Stitch, Chewbacca, Groot — humans have a lot of ideas about what aliens might look like. But what is the science behind extraterrestrial life? Is it possible that humans will ever experience "first contact" with an alien species?
