We can't observe the brain activity of extinct human species. But we can observe modern brains doing the things that our distant ancestors did, looking for clues about how ancient brains worked.
Scientists are hoping that ancient stone tools found on a family farm in Kenya will add to a clearer picture of the first appearance, duration and variation of prehistoric technologies found so far.
New fossil finds show the first large-bodied inhabitants of an isolated Indonesian island evolved to Hobbit-size, but they always remembered how to make and use stone tools.
The discovery of the oldest modern human-like pinkie bone suggests that hands emerged very early in human evolution.
Stone tools have been integral to the way archaeologists have told the human story.
Discovery of 3.3m-year old stone tools in Kenya are the oldest-known manufactured artefacts.
Stone tools excavated in Kenya date back 3.3 million years – making them about a million years older than the oldest known fossils from our own hominid genus Homo. Who made and used these tools?