Okay, I'm new here. So. I'm not sure if this has been on anyone else's mind, but I believe that aliens aren't aliens; they're us. Humans who left the planet thousands of years ago, before a big rock hit. They're back to help because the same thing will happen again. The government know and that's why they've been siphoning trillions to pay for it all. Only the young and those with lots to offer, like scientists and doctors, will make it if they're older. That still leaves billions. They're counting on many in the religious fold to opt out.