Most of us are reserving judgment on whether there is intelligent life on other planets; we haven’t even ... Institute, has no such doubts. It was in 1961, when he was working at the National ...

Plate tectonics give Earth its mountains, earthquakes, continental drift and maybe even helped give rise to life itself. But ...

"Even if a planet is in the habitable zone, if it has too small a water inventory, it transitions to an uninhabitable state." ...