You've done well. Figured a lot of it out. The greys are Lucifer/the Watchers/Fallen. They blew up their planet which is now the asteroid belt. This event coincides with the falling of the canopy over Eden (Earth). They've been here ever since. Also, 666 IS the number of man, not the "antichrist" or "Satan." Good job on that.

Human body temp. = 98.6
Water freezes @ 32
Water boils @ 212

Move the Fahrenheit scale down 32 degrees and what happens?

Water freezes @ zero.
Water boils @ 180 (number of degrees in a triangle, which is also the alchemical symbol for water)
Human body temp. = 66.6