Scientific American Magazine

An increasingly accepted view holds that the great stone circle may have been just part of a much larger ceremonial landscape

Mercury has never been orbited by a spacecraft before. That will change this month

Recent global health campaigns have focused on HIV, tuberculosis and malaria. Tackling the growing threat from cancer, says medical anthropologist Paul Farmer, could improve health care more broadly

A new computer-imaging technique shows researchers how brain cells communicate—one molecule at a time

A creative use of stem cells made from adult tissues may hasten drug development for debilitating diseases

By mapping equatorial rainfall since A.D. 800, scientists have figured out how tropical weather may change through 2100

A 19th-century thought experiment has turned into a real technique for reaching ultralow temperatures, paving the way to new scientific discoveries as well as to useful applications

On a trip to the Gobi Desert, a team of fossil hunters unearths a death scene that reveals new clues about how dinosaurs lived

When tragedy strikes, most of us ultimately rebound surprisingly well. Where does such resilience come from?