Chinese and American researchers have redated bones and tools from the richest Homo erectus site in the world with a new radiometric method. In work published this week, they date the oldest human fossils to about 770,000 years ago, showing that H. erectus was able to survive mild glacial conditions at a northern site

Wearable cameras offer help to people with memory problems and provide a tool for studying how the brain creates and retrieves personal histories

This detailed history illuminates the technical, sociological, and political complexities of establishing and operating a laboratory at the frontier of big physics