Neanderthals used sophisticated techniques with a stone drill to treat a painful dental cavity, according to new research.

The molar showed that the Neanderthal who underwent the dental procedure was an adult, though the researchers do not know the individual's gender.

Newly studied footprints from two coastal sites in Portugal show that Neanderthals were moving across dunes and beaches there around 82,000 to 78,000 years ago. One site preserved a single footprint ...