TheTimeShrike t1_j0yonkv wrote
Reply to comment by Draviddavid in Which theory about aliens is the most likely? by [deleted]
That doesn’t sound right at all. We know about dinosaurs from millions of years ago, I don’t think all evidence of humanity with our ridiculous megastructures and plastic garbage islands the size of states are going to completely disappear anytime soon. But hey, I could be wrong.
Draviddavid t1_j0yp20t wrote
Maybe it was 400 million years. But even that is a pretty short time scale in universe terms.
quadriplegic_cheetah t1_j0yug6l wrote
No really. Thats a pretty substantial amount of time even relative to the time of the Big Bang. Especially when you consider how long it takes for life to form at random.
And even then, after millions of years, an advanced civilization could probably find traces of us on this tiny rock. Even after 100’s of millions of years.
ridgecoyote t1_j0yubkh wrote
One theory is that former tech relied on biological advances rather than material advances.
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