Scientists say they have solved the mystery of the Burtele foot, a set of 3.4 million-year-old bones found in Ethiopia in 2009. The fossils, along with others unearthed more recently, have now been ...

One August day in 2008, a pair of nine-year-old boys crossed paths at a cave in South Africa. The boys didn’t play, didn’t speak, didn’t even smile at each other. One of them was Matthew Berger, the ...