One of three newly found prehistoric arm bones, likely from a Neanderthal, suggests that the individual had a muscle injury near the shoulder.
The bacteria that cause the illness may have been lurking around for 15 million years -- long before humans walked on Earth.
A 1.4-million-year-old hand-bone fossil means the modern human ability to make and use complex tools may have originated far earlier than scientists previously thought.
An unusual prehistoric fish with fins near its butt has helped to solve the mystery over why most animals, including humans, have paired limbs.
A neanderthal skeleton unearthed in Italy shows interbreeding with humans, the first such known hybrid.