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The galaxies' fanciful names belie their actual ages: In this case of the Penguin and the Egg, it’s the Egg that came first.

President Trump has charted a new course for electric vehicle policy in the U.S. While the direction is clear, the details aren't.

An NPR investigation found Louisiana health officials told staff to stop promoting vaccines for COVID, flu and mpox, holding flu shot events or otherwise encouraging the public to get those vaccines.

With a skin sample from a 52,000-year-old woolly mammoth, scientists are gaining new insights into what made the animals tick. The findings could also help controversial de-extinction efforts.

Negotiations over a U.N. treaty to cut plastics have been bogged down. Environmental groups blame the oil and gas industry.

Three delegates said they want to hear Kamala Harris focus on bread-and-butter issues and reproductive rights in her speech to the convention Thursday.

Friday's debut of new pandas at the National Zoo in D.C. is the latest chapter in a long tale of "panda diplomacy" between China and the rest of the world.

Only about 300 to 400 people a year give a kidney to someone they never met. It's an act of generosity so unusual, a neuroscientist studies the people who do this.

Many authors are concerned about the use of their copyrighted material in generative AI models. At the same time, some are actively experimenting with the technology.

The board, which oversees the city’s use of surveillance technology, has had to cancel its latest meetings because it lost so many members.