Testis descent and temperature Descent of testes is surely connected with the fact that all mammals are “warm-blooded”, typically having high core body temperatures around 37 o C (98.6 o F). Going ...

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 ...