Archaeological finds suggest that people developed numbers tens of thousands of years ago. Scholars are now exploring the first detailed hypotheses about this life-changing invention
Archeologists say stone artifacts point to occupation more than 30,000 years ago—but not everyone is convinced
Some individuals choosing physician-assisted death donate their tissue to science.
An ancient cranium discovered in Ethiopia suggests the early hominin evolutionary tree is messier than we thought
2.1-million-year-old stone tools suggest hominins reached East Asia much earlier than thought
