Horner syndrome is characterized by drooping eyelids, constricted pupils and a lack of sweating on one side of the face.

A Texas woman died from a rare brain-eating amoeba after using tap water in a sinus rinse, a CDC report says. Here's what to know about the often fatal infection.

An animal sanctuary has announced that its rare snow leopard cub, born just last month, has died. The cub, nicknamed Little Lady, was born to mother Laila at The Big Cat Sanctuary in Smarden, Kent ...

A 6-year-old boy suffocated to death because of a balloon, officials and family said.

An Indiana boy died hours after he complained of only mild symptoms that ended up being a rare and fatal bacterial infection, his grieving mother revealed.

A Texas woman died after contracting Naegleria fowleri, a fatal brain amoeba, from using unboiled tap water in a nasal irrigation device at a campground, prompting CDC warnings.

Health Scientists Just Found a New, Incredibly Rare Blood Type A French woman in her 60s is the only person in the world known to carry it so far.

Alf Clausen, the Emmy Award-winning composer of "The Simpsons," has died at age 84, his daughter told The Hollywood Reporter.

A 6-year-old boy died last month in what the the Wabash County coroner has concluded was a “tragic accidental death” involving a balloon.

Researchers photographed a rare Upemba lechwe, a critically endangered African antelope, in the Democratic Republic of the Congo, a study said. Photo from Getty / iStockphoto For two days, a team ...

Some animals are so rare, they are more like myths than living, breathing organisms. Take the Upemba lechwe, for example. It’s a subspecies of the red lechwe antelope that lives in a small ...

Researchers photographed a rare Upemba lechwe, a critically endangered African antelope, in the Democratic Republic of the Congo, a study said. Photo from Getty / iStockphoto For two days, a team ...