In the 1980s, scientists learned that all humans living today are descended from a woman, dubbed “Mitochondrial Eve,” who lived in Africa between 150,000 to 200,000 years ago. This discovery, along with other evidence, suggested humans evolved from a single…

The mysterious ’neuston’ ecosystem at the ocean’s surface includes keystone organisms like the golden seaweed Sargassum that makes up the Sargasso Sea, floating barnacles, snails, nudibranchs, and cnidarians; this Essay explores threats to its wellbeing and…

Chiara Marletto is trying to build a master theory — a set of ideas so fundamental that all other theories would spring from it. Her first step: Invoke the impossible.

In animal studies, "smart" immune cells genetically engineered to attack tumours in a new way eradicated brain, ovarian and asbestos-related tumours where normal immune cells failed

Twenty French generals implore the government to take a firm hand against chaos.