Colin Barras is a science journalist in Ann Arbor, Michigan.
How Did Neanderthals and Other Ancient Humans Learn to Count?
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
Controversial Cave Discoveries Suggest Humans Reached Americas Much Earlier Than Thought
Archeologists say stone artifacts point to occupation more than 30,000 years ago—but not everyone is convinced
Medical Euthanasia Brings New Questions for Researchers
Some individuals choosing physician-assisted death donate their tissue to science.
Rare 3.8-Million-Year-Old Skull Recasts Origins of Iconic “Lucy” Fossil
An ancient cranium discovered in Ethiopia suggests the early hominin evolutionary tree is messier than we thought
Tools from China are Oldest Hint of Human Lineage Outside Africa
2.1-million-year-old stone tools suggest hominins reached East Asia much earlier than thought