Seeking an answer, a useful first step is to trace the evolution of descended testes. Testes remain high up in the abdomen in egg-laying mammals (monotremes), but descend in all marsupials, ...

Reader, here is an incomplete list of things you should not try with elephants: a memory contest, jump rope and castration. See, in addition to having uncanny recall and a firm relationship with ...

My 2013 book, How We Do It, addressed an enduring mystery in mammal reproduction: “It is often claimed that the word ‘testify’ comes from an ancient Roman custom in which a man would clutch his testes ...