Exhaust Systems in Nature 2019-10-06 18:07:55.634306+02 by Dan Lyke 0 comments Monkeys With Smaller Testicles Scream Louder to Compensate Evolutionary Trade-Off between Vocal Tract and Testes Dimensions in Howler Monkeys https://doi.org/10.1016/j.cub.2015.09.029