It's becoming increasingly likely that there was at least one civilization before ours. If that does turn out to be true, then it begs the question: how many were there before ours? Are we the tenth civilization, or the thousandth?
It's becoming increasingly likely that there was at least one civilization before ours. If that does turn out to be true, then it begs the question: how many were there before ours? Are we the tenth civilization, or the thousandth?
(post is archived)