Deeper Calls, Smaller Balls

Thursday, October 22, 2015 - 12:40 in Biology & Nature

Across the animal kingdom, males hoot and holler to attract females and ward off competing suitors. Now, a new study finds that male howler monkeys with deeper calls have smaller testicles - and vice versa, according to researchers from universities of Utah, Cambridge and Vienna and other institutions.

Read the whole article on Newswise - Scinews

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