You didn't understand my argument. *AFTER* the divergence, anything could happen (and to fit the setting, it should be in line with the 50's pulp sci-fi and the World of Tomorrow, with which plasma rifles are), the problem is something that doesn't exist in our world happening in the Fallout world *BEFORE* the divergence. Roswell may have happened in the 40's in our world, but there certainly wasn't real aliens there (unless you want to argue there were, but then we'd be way off topic), just the scare of them. But for aliens to actually exist in the Fallout world at any time, that means they should have existed *BEFORE* the divergence. Unless they were spawned and evolved to that state in the less than 300 years elapsed since the divergence to F3. Which didn't happen anyway, since from what I heard, according to MZ they were already around abducting people since the 1600's.
right and according to our own universe theres biblical proof of UFO's... .
the bruden of proof falls upon you..
can you disprove the existance of aliens in our universe?
i dont think anyone can.