Big Brain Means Small Testes, Finds Bat Study
Big Brain Means Small Testes, Finds Bat Study
(New Scientist)
The analysis of 334 species of bat found that in species where the females were promiscuous, the males had evolved larger testes but had relatively small brains. In species, where the females were monogamous, the situation was reversed. Male fidelity appeared to have no influence over testes or brain size.