The breakup of the pre-Pangea supercontinent Rhodinia is believed responsible for the end of “Snowball Earth” and the subsequent “”Cambrian Explosion”, the sudden appearance of more varied and complex life forms.
25 posted on 08/13/2018 4:20:57 PM PDT by ETL
(Obama-Hillary, REAL Russia collusion! Uranium-One Deal, Missile Defense, Iran Deal, Nukes: Click ETL)