Full-grown humans have 206 bones in their bodies. Learn all about them — plus the ligaments, tendons, and cartilage that connects them — here.
Your endocrine system is a collection of glands (including the pituitary gland, the adrenal gland, the ovaries and the testes) that secrete hormones to regulate mood and many critical body processes.
Australia's Great Barrier Reef is an enormous and spectacular natural wonder, and it is also increasingly threatened by a warming world.
The terms "sex" and "gender" are frequently used interchangeably, but the connotations of "gender" are more complex.
Feed your sweet tooth with the latest health findings on the sugar in your tea, your food and all over your body.
Are you the predator, or the prey? Here is the latest news and findings on creatures that hunt, kill, and make Shark Week the best week.
The reproductive system is a collection of organs found in both sexes that work together for the purpose of producing offspring.
Autism is a developmental disorder that affects a person's ability to communicate and interact with others.
The Cretaceous, the last and longest period of the dinosaur age, lasted from about 145.5 million to about 65.5 million years ago.
During the Viking Age, which lasted from about A.D. 800 to 1066, Scandinavian seafarers raided foreign lands, began new settlements and traded goods such as furs, reindeer antlers and seal fat.