Why complex life could prove remarkably common in the universe

时间:2019-03-07 12:13:03166网络整理admin

Abdul Azis/Getty Do we live on a rare earth, so exceptional that it is pretty much alone in hosting a rich diversity of life, with almost all other planets being home to simple microbes at best? Or are we in a universe teeming with living things as complex as those here, meaning that we exist as part of a vast, cosmic zoo? Debate on this rages on,