TRACES of milk found in 9000-year-old ceramic pot fragments have pushed back the earliest known consumption of animal milk by people by a millennium.

Cattle, sheep and goats were domesticated in the Near East about 10,000 years ago, but many archaeologists believe people used only their meat and hides at first, with secondary uses such as wool, power and milk coming much later.

Richard Evershed at the University of Bristol, UK, and his colleagues collected 2225 pottery fragments from the Near East, dating from the seventh to fifth millennia BC. By measuring carbon isotope ratios in organic residues on …