Agreed. It’s a minuscule probability per planet multiplied by a vast number of planets and it’s hard to say which factor carries greater weight. The fact that w

Agreed. It’s a minuscule probability per planet multiplied by a vast number of planets and it’s hard to say which factor carries greater weight. The fact that we haven’t detected any signals from space also sets a limit on the likelihood/duration of intelligent life in our area of the universe.