Are we alone in the universe? What can Earth's living creatures teach us about the possibility of extraterrestrial life? What do living things need to survive? How did life begin? Scientists called Astrobiologists look for answers.
Earth has some pretty extreme environments, yet organisms have found a way to fill every niche. This finding has renewed our hope that life exists elsewhere in the universe.
Just 3 basic ingredients make Earth a habitable planet: liquid, atoms, and energy. Looking for them elsewhere may help us find life on other planets and moons.