Clouds of painted lady butterflies are flying through Southern California. The reason? Abundant rainfall that has caused an explosion of plant growth.

The unit of UnitedHealth Group was found to have abused its discretion under federal laws.

David Bernhardt, the agency’s acting chief, wants to roll back endangered-species protections on a tiny fish, a change that benefits few outside a California group he once represented as a lobbyist.

The National Parks are in partial shutdown. But America’s wilderness shines in a show at the Museum of Fine Arts in Boston that reveals how human intervention has changed purple mountains’ majesty.

Under a new governor, it’s hoping to use its status as the most populous state as leverage when it negotiates with drug makers.

The monarchs’ declining wintertime numbers are “potentially catastrophic,” according to the nonprofit conservation group that conducted the count.

Federal health officials believe it’s safe to eat the lettuce if it’s grown in greenhouses or other regions — and is labeled as such.

Many hunters are ditching traditional ammunition amid mounting evidence that it harms scavengers and pollutes the food people eat.