It is not, and I have live, precise experimental situations in over 30 sites around the world that prove that it is not. (globalclimatescam.com)
One possible explanation would be that these different models were used in different historical circumstances, just as there are «different experimental situations» in physics. (religion-online.org)
The research is the first to directly compare facial expressions between humans and other primates in an identical experimental situation. (sciencedaily.com)