3 ms·
It's not canon. There are lots of theories, but none is widely accepted. http://en.wikipedia.org/wiki/Cambrian_explosion#Possible_causes_of_the_.E2.80.9Cexplos
by sampo 13y ago
It's not canon. There are lots of theories, but none is widely accepted.
http://en.wikipedia.org/wiki/Cambrian_explosion#Possible_causes_of_the_.E2.80.9Cexplosion.E2.80.9D http://en.wikipedia.org/wiki/Cambrian_explosion#Possible_cau...