I had an imagining.What if Pangea was Atlantis. An advanced specie's our ancestors. A highly intelligent race of beings that had the advantage of full access to the capabilities of the brain. For seeing a great cataclysm they sent a few select specimens into the above,in the hopes that when they returned they could rebuild. Unfortunately for them when they did return they found a man monkey of far lower intelligence. So maybe our aliens/gods are our ancestors. This would explain abductions. The extraction of our DNA the experiments they put those through are to figure out what went wrong and fix it. Trying to return us to our former state. Just an imagining.