Monkeys using stones to crack open nuts generate many stone flakes accidentally that look exactly like the ones archaeologists have long thought early humans made intentionally as tools. Oops.
Leakey made important contributions to our understanding of human origins through his fossil finds. He later gained fame for taking on poachers who threatened to wipe out Kenya's elephants and rhinos.
Without a cure for Alzheimer's and other forms of dementia, prevention is paramount. Habits that helped early humans thrive still make sense: a varied diet, exercise and an engaging social life.
Lab-grown brainlike organoids altered with an ancient gene began to look and behave differently. The experiments help show how the human brain has evolved.
Duke anthropologist Brian Hare argues that humans evolved in a way that left us more cooperative and friendlier than our now extinct human cousins, like Neanderthals and Denisovans.
