7 ms·Or Remembrance of Earth's Past, or probably a bunch of less well known options.by _0ffh 7y agoOr Remembrance of Earth's Past, or probably a bunch of less well known options.Sharlin 7y agoYeah, the trope of Ancient Aliens inhibiting the emergence of space-faring civilizations is rather common.teekert 7y agoUs nerds love ourselves some Fermi Paradox explanations.