Researchers recently found that polar bears are facing higher exposure to certain bacteria and viruses.

BIOLOGY
The average body temperature isn't actually 98.6°F, a fact scientists have known for at least three decades. So why does this myth persist?
The alien-looking, bloodsucking fish have cells that may form the same rudimentary nervous system we have.
The act of bringing another person into the world comes with a whole host of things you might not have anticipated, from a phenomenon called “lightning crotch” and disappearing belly buttons to unexpected excrement and so much more.
At some point, whether during the day or at night, all birds need to sleep. How do they do it?
A single number for birds’ lifespans is difficult to pin down, but the ability to fly is one of the keys to their longevity.
Foxes are highly skilled hunters, which allows them to eat a variety of small animals.
Though she died of cancer in 1951, Henrietta Lacks's immortal cells became the foundation for countless medical advancements.
It has even led to the discovery of a new species.
Opossums have a bad reputation, but they’re smarter and more beneficial to people than other woodland denizens. Discover more about these unique marsupials here.
The baby croc was the product of a mother who has spent her entire life in captivity.
Before home pregnancy tests, the most reliable test was just to wait and see. But people still wanted to know as early as possible whether they were harboring a tiny human.