Howler monkeys are known for their booming calls that can be heard for miles, but the science behind their roar is even more intriguing. Studies show these vocalizations honestly signal body size and ...

Dating is tough. We all know that. To attract the right mate, or any mate at all, you have to stand out from the crowd. Maybe your best quality is your sense of humor, or your twinkling eyes, or your ...

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 ...