> Where is everybody? When was everybody? Space is a very large place. But spacetime is doubly so. On earth it takes a few tents thousands years to have a ci

> Where is everybody? When was everybody? Space is a very large place. But spacetime is doubly so. On earth it takes a few tents thousands years to have a civilization vanish. Put 1 million and even the most advanced civilization will become unrecognizable dust.