Aliens aren't really aliens at all.......
Ever wonder why most descriptions of aliens by people who claim to have seen one are of bipeds with spindly arms and legs with big heads and big eyes, like in Close Encounters. And not slimy three headed silicone based life forms with tentacles. It's because they are really what's left of the Human race, and have travelled back in time to collect genetic material to keep the dying race going. That's where all the weird sex experiment stories from people that claim to have been abducted come from.
Just another Mike on Gunks.com