Meteorologists are reaching for superlatives to describe an oncoming heat wave so intense and rare for this time of year that ...

(CNN) — Jessie Diggins is an endurance athlete. The Olympic cross-country skier describes the intensity of suffering her sport can inflict as a “pain cave.” It doesn’t frighten her; she’s used to ...

(CNN) — The Supreme Court agreed Monday to take up a major environmental appeal from fossil fuel producers who are hoping to shake off a lawsuit from a Colorado city that wants to hold them ...

Rising carbon dioxide levels are heating the planet but may also have an alarming, invisible impact on the human body, ...