Human Footprint Found To Be 500 Million Years Old

I have a theory, maybe there are other more advanced human races in the universe, and maybe we are their decedents.

Let’s say humans aren’t originally from earth, but some other planet somewhere else and these more advanced humans visited eligible planets to scout out if it would be a good candidate to drop some offspring and spread the human race around the universe.

So they end up on earth decide it’s a good match for us and leave some humans here, and then they go back to exploring other planets light years away from us and they could’ve done this to so many planets that we were forgotten about, or we just aren’t as special as we think..that’s why they don’t visit us anymore …or maybe they do?