Free Republic

When did something like us first appear on the planet? It turns out there’s remarkably little agreement on this question. Fossils and DNA suggest people looking like us, anatomically modern Homo sapiens, evolved around 300,000 years ago. Surprisingly, archaeology—tools, artifacts, cave art—suggest that complex technology and cultures, “behavioral modernity,” evolved more recently: 50,000 to 65,000 years ago. Some scientists interpret this as suggesting the earliest Homo sapiens weren’t entirely modern. Yet the different data tracks different things. Skulls and genes tell us about brains, artifacts about culture. Our brains probably became modern before our cultures.Key physical and cultural milestones in...

In the era whose secret he uncovered, a journalist's office would have looked just like the one where Yang Jisheng works now. The tiled floor, the grimy window panes, the desk piled two feet high with papers, envelopes and books. The Mao-era radiators. The cigarette ash and the dust. Under Mao Zedong, Yang's good fortune was to find a job as a reporter with China's state-run Xinhua news agency. His misfortune had been to see his father die of hunger in 1961, at the height of the famine that killed an estimated 36 million people: "When my dad died, I...