Dunn’s team analyzed the biological “budget” of these primates and found a direct negative correlation: males with large ...

If you lose your sight, you make up for it with other senses. If one arm is amputated, you learn to do twice as many things ...

Howler monkeys are relatively small primates known for their incredibly loud, low-frequency roars that sound as if they come from a much larger creature. This is useful in the animal kingdom because ...