The Biden-era limits were designed to reduce emissions of toxic pollutants, including a cancer-causing ingredient used in antifreeze and plastics.

Mommy, a Western Santa Cruz tortoise, recently welcomed four hatchlings at the Philadelphia Zoo, where she has lived since 1932.

Recent Trump administration actions are setting the stage for a measles resurgence, experts fear.

Administration officials reversed a decision made during the Biden presidency that would have given millions of people access to weight-loss drugs paid for Medicare and Medicaid.

After years of NASA and private crews returning to Earth near Florida, the company shifted its landing zone to the West Coast for the private Fram2 mission.

As they cling to leaf tips, newborn warty birch caterpillars produce vibrations that can ward off invaders approaching their millimeter-size domain.

The ancient weapons, found in a cave near Marfa, could be among the oldest near-complete set of wood and stone hunting tools found in North America.

President Trump wants to bring pharmaceutical manufacturing back to the United States. Experts warn that tariffs could result in shortages and higher prices for generic drugs.

Born into rural poverty, he climbed to the top of the art market. But he fell after being convicted of selling fake and stolen items.

Hundreds of hours of recordings suggest that the apes can generate meaning by stringing sounds together in pairs. But some scholars are skeptical.