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 ...

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

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 ...

If evolution had a sense of humor – its favorite punchline might be the howler monkeys. These tree-top vocalists are nature’s rock stars: dramatic, loud and convinced that volume equals value. They ...