2) If elsewhere = several thousand to million+ years closer to the bigbang than Earth, then implies civilization is aprox that much older/more advanced than us.
3) If we went from horse and buggy to travelling at 20,000 km/h in space in the course of 3 centuries, to say nothing of discovering Newtonian theory all the way to quantum mechanics, then it is plausible they have even far more advanced theories (of everything?), if they are a mere few hundred years more advanced than us, nevermind if they are 10,000 or 1 million+ more years more advanced.
4) Anything after 500 years would look like magic to us. It is thus not impossible (though yes it is impossible by our incomplete quantum theories today), that they have managed to not only figure out how to travel across however many hundreds or thousands of light-years to us, but also that they've managed to figure out time-travel, whether physically or "read-only", only.
5) Once "4)" is a reality, at least half the thousands of UFOlogy "crazy" reports becomes plausible if not some variant of truth/reality (i.e. ancient aliens, space craft that appear out of nowhere, craft that can travel 10,000 miles/hour then do a 90 degree right turn, human abductions for genetic experiments/ ongoing species hybridization, etc ).
In other words, humanity may have been created/started by intelligent design (or not - perhaps we really did start from monkeys) and then continued on its own via Darwinian evolution and/or accelerated along the way by our alien overlords. In either case, intelligent design (or "alteration" if only half way through) thus becomes possible
As the saying goes: "If you're one step ahead, you're a genius! If you're two steps ahead, you're insane!"
PS. Queue the downvoting...