One moment of bad luck can turn things sour quickly. Ardi Ndembo, a 27-year-old Congolese boxer, became the most recent example of the tragedy that can follow the sport. Ndembo suffered a knockout ...

Two fossils named Ardi and Lucy provide evidence for human evolution. Both were found in Africa. Ardi is a female human-like fossilised skeleton that dates from 4.4 million years ago. Ardi's bones ...