Global study of 48 cities finds nature sanitizes 41.7 million tons of human waste a year

42,000-year-old trees allow more accurate analysis of last Earth's magnetic field reversal

UK hospital admissions for food-induced anaphylaxis triple over 20 year period but death rate falls

Million-year-old mammoth DNA rewrites animal’s evolutionary tree - The oldest DNA yet sequenced shows how the genus split off into new species.