A local worker initially noticed stone tools and animal fossils eroding from ... cruder implements like those found at Lomekwi 3, a 3.3-million-year-old site in northern Kenya.

Early bipeds, such as Ardipithecus kadabba which looked a bit like a gorilla, lived in Africa between 5.8 and 5.2 million years ago. They lived in mosaic habits (a mixture of open and wooded ...