[AlexW]

“Have you ever heard of space wormholes?”
_________________________________________

Yes, of course. Worm holes, folding and parallel universes are the favorite claim of the UFO crowd. It is about the only concept that they now have, but it leads to nothing.
To my knowledge, none of it has been proven.
Even if it is true, it still does not mean that we are, or ever have been visited.
Get back to me when one lands in public and the occupants
say “Take me to your leader”.

[dr_lew]

To my knowledge, none of it has been proven.

Far from that, it's entirely hypothetical. Cf. Misner, Thorne, and Wheeler, GRAVITATION page 838: "Communication through the wormhole is impossible; it pinches off too fast."

[editor-surveyor]

>> Get back to me when one lands in public and the occupants
say “Take me to your leader.” <<

.
Or perhaps “We are your new leader.”