The posterior pituitary is the smaller of two lobes that make up your pituitary gland. It secretes vasopressin and oxytocin into your bloodstream — hormones that play a role in water balance, ...

The ability of some animals to dynamically change color to match the brightness of their surroundings is one of nature's ...

The U.S. Food and Drug Administration has approved another once-a-day pill that works without hormones to treat ... nerves in the hypothalamus — an almond-size region deep inside the brain whose ...