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 - ...

A new study from the good people at Emory University has found that a man's testicle size can determine what kind of father he can be—fathers who have a smaller set of jewels down below tend to be ...

If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have ...

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