Earthlike Planets May Be Common, Analysis Suggests

Are we alone? The question has tickled the human imagination for years, perhaps ever since our earliest ancestors looked up at the night sky into the endless sea of stars. Is anyone else out there?

Humans do not yet have a definitive answer to the question, but a team of astronomers running computer simulations of planet formation has found that Earth-like planets with enough water to support life could be fairly common.