Ancient aliens... na, how about ancient idiot humans that continue to nuke themselves back to the stone age every couple thousand years. Would explain all the nuclear hotspots on Earth... and probably why Mars is screwed up. Might even explain Atlantis and all our wonderful biblical stories. Could probably explain why we have no historical records or why we've been able to advance so far in the past 100 years. Honestly, if you were some advanced ET, would you want anything to do with us? Maybe Sarah Palin was right! We did walk with dinosaurs!
I'm bored