Have aliens from other planets/worlds visted earth?

[Mars_ax]

There's always the thought that the humans and other creatures inhabiting the earth are aliens, because they might have evolved from living matter from outer space and/or from an asteroid, meteor, et al. That's one way of looking at it, the religious thing, (creationism) is utter nonsense, not even worth serious consideration.

I also strongly believe that a myriad and/or infinitesimal number of higher life forms exist on planets with the right conditions all over universe. Who knows, somewhere primates similar to the ones on Earth may even have evolved. The problem is, it may be eons before humanity ever finds out.

P.S. As for finding 'life' in other places in our solar system besides Earth, it's almost a 100% certainty we will someday, for starters, Europa perhaps?