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 four billion years of our ...

Primates belong to a diverse taxonomic order, all united by one sexy pursuit. The large-nosed proboscis monkey, the large-testicled chimpanzee, and all primates in between want to have as much sex as ...

The average testicle size is around 4 x 3 x 2 centimeters (cm). However, testicle size can vary. A person may also have one testicle smaller than the other. The testicles are oval-shaped male ...

Testosterone therapy can significantly improve energy, libido, and overall quality of life for men with low testosterone levels, but concerns about testicular shrinkage often give patients pause.