Add Yahoo as a preferred source to see more of our stories on Google. With little evidence, some people believe a certain probiotic can increase testicle size.Pictured: One large and one smaller ...

It’s a long-held belief that loud mouths overcompensate for something, but in the case of howler monkeys, science has confirmed it’s a biological fact. A landmark study by Dr. Jacob Dunn at Cambridge ...

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 ...

A link between the size of a father's testicles and how active he is in bringing up his children has been suggested by scientists. Researchers at Emory University, US, said those with smaller ...

Are men with smaller testicles more involved dads? Could be, say the authors of a new study. Anthropologists from Emory University in Atlanta wanted to try to better understand why some men are more ...

A study has suggested that soda consumption may increase testosterone levels and testicle size in men. The study, conducted by researchers at the Northwest Minzu University in China and published in ...

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 ...