A group of red colobus monkeys in Uganda have been found to care less about grooming and more about sex after eating leaves from a tree with an estrogen-like compound.
The high levels of estradiol and cortisol found in male monkeys after dining on the leaves of Millettia dura are believed to be responsible for more acts of aggression and sex compared to time spent grooming.
The findings could help to further understanding of the impact of diet on human evolution.
Read more at University of California, Berkeley