Early last year, keepers at Chester Zoo first spotted that 25-year-old Rico, a two-toed sloth, had swellings on the side of his face. A series of health check-ups, including a CT scan, revealed that ...

Cavemen conducted dental surgery tens of thousands of years before anesthetics, reveals new research. Neanderthal dentists were using stone drills to treat cavities nearly 60,000 years ago – more than ...

Many of us will lose an adult tooth in our lifetimes, whether through disease or misadventure – a punch that landed, a skateboarding trick that didn’t, say. And if you join these ranks, which include ...