Evolution is still a controversial subject in the States (not so much in Europe). What do you think?

Need Assistance With Video Summary The current thinking of why mammals live in the sea is based on the hypothesis that mammals evolved on land and marine mammals are a lineage of mammals that returned to the sea.  Please watch the PBS video found at the following link:   http://www.pbs.org/wgbh/evolution/library/11/2/e_s_3.html or https://www.youtube.com/watch?v=ewtw_nZUIDQ     Evolution […]