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 ...
ZME Science on MSN
Monkeys With Smaller Testicles Scream Louder to Compensate
Dunn’s team analyzed the biological “budget” of these primates and found a direct negative correlation: males with large ...
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