Though it may be unsettling to humans, the act of eating feces, or coprophagia, is a common behavior among dogs. But why do dogs eat poop?
Did you know that autoimmune diseases predominately affect women, or that some people have hardly any immune system? Here are 11 surprising facts about the immune system.
The deadly white plague of corals was once thought to be caused by bacteria, but viruses may also be involved in the disease.
Did you know that doctors once diagnosed diabetes by tasting patients' urine? Here are 11 surprising facts about the endocrine system.
Did you know that some animals don't have stomachs, or the reason why flatulence smells bad? Here are 11 surprising facts about the digestive system.
Unlike many other animals, kangaroos have sex for a long time — up to 50 minutes. And the female has three vaginas, two of which are inseminated by the male's double-headed penis.
The human circulatory system was once a subject of great mystery, but now, modern science has revealed its inner workings. Here are 11 surprising facts about the human circulatory system.
It may be alarming to see green poop in your toilet bowl, but it isn't necessarily a cause for concern.
A number of hypotheses exist to explain why we yawn, but scientists have yet to come to a consensus about the phenomenon.
Seahorses have a sex role reversal, where males get pregnant instead of females. But how do they actually get busy and get pregnant in the first place?
It's pretty well-known that most clouds are white, while rain clouds are usually a darker shade of gray. But why are rain clouds so dark?