1200 millions of years ago the Earth died. A meteor shower impacted us, and the Universe continued.
A group of cosmic hierarchies authorized a travel from extraterrestrial civilizations on Earth's direction to act and prevent from dying and an alternative time was created. They saw that it was good and a parallel reality synchronized with the terrestrial time.
Guided extraterrestrial vehicles landed and the first footprint was from a being about a one meter eighty, dark gray skin, wide face and eyes slightly open: the first of the M.'s.