I'm gonna sprout some BS.
So, I just learn that Global Warming can decrease humans average body size and I literally started pondering about it.
Aliens.
People are always wondering where aliens comes from and I'm always paranoid with them.
I assume that aliens came from the future and the fact that Global Warming can decrease the average size of the human body only give more of a bullet-proof evidence for my theory!
So, basically, Aliens came from the future where the technology is far more advance and so does the intelligence. A new language has been invented.
But the future is also where the global warming has gone too severe, humans