The human body is a machine whose many parts—from the microscopic details of our cells to our limbs, eyes, liver and brain—have been assembled in fits and starts over the 4 billion years of our ...

(via AsapSCIENCE) Testicle size varies in homo sapiens - and it turns out the size, shape and even droop of your balls says a lot about you. Primate testicle size says a lot about our testicle size - ...

Men who have smaller testes are more likely be better dads to their toddlers, according to a study published in The Proceedings of the National Academy of Sciences. Researchers from Emory University ...