RT @newscientist: Comet 67P’s water is interstellar stuff, like the pristine material that made the solar system ow.ly/MEIpL http://t.co/4QVlFF9J5s
RT @newscientist: Comet 67P’s water is interstellar stuff, like the pristine material that made the solar system ow.ly/MEIpL http://t.co/4QVlFF9J5s