The remains of extinct Homo erectus dredged from the seabed off Java, along with thousands of animal fossils, are revealing a long-lost ecosystem.

Sewage-contaminated water absorbs certain wavelengths of light, leaving a signature that can be detected by space-based instruments, a new study finds.

Adults who walked more than 100 minutes per day were less likely to have chronic low back pain than those who walked fewer than 78 minutes per day.