The panspermia hypothesis posits that living cells or their precursors could have emerged on another planet or moon billions of years ago and hitched a ride to Earth on a meteorite.
The panspermia hypothesis posits that living cells or their precursors could have emerged on another planet or moon billions of years ago and hitched a ride to Earth on a meteorite.
“胚种假说”假设：活细胞或其前驱物可能于数十亿年前发源自其它行星或月球上，并且搭陨石的便车来到地球。