Homo sapiens evolved big brains not so that we could make tools but so that we could keep track of 150 friends and competitors.
We often make friends today who turn into foes tomorrow. It’s all part of the way we’ve evolved as cooperative and competitive animals.
Scientists are getting better and better at using DNA to figure out when key evolutionary events happened.
Some research suggests that throughout our evolution an innate tendency toward fighting shaped human anatomy. But anthropologists are sharply divided on the matter.
How and when our ancestors mastered the use of fire remains a hotly debated question. Researchers are hunting for answers buried in ancient ash and baked soils.
New finds at an archaeological site in Morocco open a window on the origin of our species.