Just To Put Things In Context
The Earth Is Roughly 4 Billion Years Old, T-r...
Precambrian Is Made Up Of
The Hadean, Archaean, And Proterozoic Eras, A...
The HADEAN EON
(4.5-4.0 Billion Years Ago) Is An Unofficial ...
The GIANT IMPACT HYPOTHESIS Suggests That&nbs...
The Moon Was Formed Around This Time By A Col...