Habitual baby-killing is being thwarted by promiscuous females and big balls
Friday, November 14, 2014 - 02:03
in Biology & Nature
From the mouse to the lion, many mammal species engage in infanticide, where dominant males compete by killing off each other's babies. But a new study has discovered that a sexual arms race could be phasing out this violent behaviour, with the females becoming promiscuous to force the males to compete with their sperm instead.