Jane Goodall reported cannibalism and infanticide by both male and female chimpanzees in 1977.
At first scientists thought them to be isolated attacks, but a 2007 study in Current Biology documented several other instances of this behavior, even in female chimpanzees—once thought to be gentler than more aggressive males.
To Pfennig, chimps likely cannibalize to reduce competition for food and mates—and because other chimps are simply a good meal.
Talk about having your friend and eating it, too.