We May Have Snakes To Thank For Our Acute Vision
Next time you run into an African bush viper like this one, be thankful for your forward-facing eyes.
In a new paper published in the journal Primates, author William C. McGrew, a former professor of evolutionary primatology at the University of Cambridge, reports a high rate of venomous snake encounters by his team of primatologists seeking to observe unhabituated wild chimpanzees in Mount Assirik, Senegal, West Africa.
McGrew's snake-encounter analysis in the paper Snakes as hazards: modelling risk by chasing chimpanzees is one test of what's known as the snake-detection theory of primate origins, a set of hypotheses that suggest we (along with other primates) owe certain features of our evolution to the risks posed by death and injury from snakes.
http://www.npr.org/blogs/13.7/2015/0...r-acute-vision