I guess it's redundant to ask if anyone has tried to leave this planet, and return to their home universe? If so, it doesn't seem they've found a successful means of leaving...

[pause] Cliffjumper? Interesting... And no. The robotics of our planet are... Well, nothing like you. If you were on Earth, I'd say you'd win more than just a Nobel Prize. [snrk] Erm, anyway...

It's nice to meet you. I was under the impression there was some "bad air" between certain members of your species.