The Endocrine System

The difference in length between the second and fourth fingers may reveal penis size.

But experts say much more research is needed before the study can hold direct implications for humans.

The Tuberous bushcricket's testes account for 14 percent of its body mass.

A build-up of signaling chemicals triggers flytraps to snap shut.

The lab-grown ovary could preserve fertility of women facing cancer treatment.

Testosterone levels decline in many men as they age; however, there is debate about whether this is a disorder in need of treatment.

The brain responds to sickness by knocking the thermostat up a few notches to stimulate production of disease-fighting antibodies.

Go ahead, grab a chocolate bar. New evidence is in that eating dark chocolate every day can reduce stress.

Guys who bike know about that strange numbness that occurs in places that should not go numb.

The conventional wisdom is that women are born with a certain number of eggs.