Some suggest that the sun would have been 6% fainter prior to the Cambrian period, and up to 20-30% fainter before that. This is more than enough to plunge the earth into runaway glaciation with no way to recover, thus preventing life from ever forming up to the present. 1 2
Site Under Construction
This site is still under construction. It needs more references, citations, and debate arguments. If you would like to help, please view the community page.