Climate-fueled storms and wildfires are increasing costs and pushing insurers to the limit. Is the market broken?

Scientists say they’ve found the cause of a marine epidemic more than 10 years after it started. What took so long?

Carbon dioxide is both a planetary threat and a driving force behind life on Earth, according to author Peter Brannen.

Mixed evidence has, in some studies, found an association with autism. No research has proved a causal relationship.

Stephanie Armour, Christine Mai-Duc, Amy Maxmen, and Arthur Allen contributed to this story. Health and Human Services Secretary Robert F. Kennedy Jr. has had a busy few months. He fired the director ...