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The amount of carbon dioxide in the atmosphere has crossed the "psychological threshold" of 400 parts per million. That number is one of the clearest measures of how humans are changing the planet by burning fossil fuels.

The carousel was first desegregated when part of Gwynn Oak Amusement Park outside Baltimore in 1963. It was moved to the National Mall after the park closed.

Researchers discovered evidence of enormous Kraken-like creatures who hunted in the seas some 100 million years ago, competing with large apex predators.

A Russian drone that was part of an overnight attack on Ukraine crashed into an apartment building in eastern Romania, injuring two people, Romanian authorities said Friday.

The mega rocket made its debut two days after SpaceX CEO Elon Musk announced he's taking the company public. NASA Administrator Jared Isaacman said Starship is now one step closer to the moon.

Bolivia's President Rodrigo Paz faces a deepening crisis as widespread protests and blockades leave the political capital under siege less than six months after he took office.

A leaked State Department memo shows the U.S. threatened to revoke Palestinian visas if they pushed for a senior United Nations post.

King Charles and Queen Camilla arrive Monday for a four-day U.S. state visit. Some hope the royal touch can heal the trans-Atlantic rift that's emerged under Trump.

The investigation into abuse and mistreatment of Native children at the boarding schools for more than a century proposes $23 billion in funding aimed at healing.

Ukrainian drones struck an oil terminal in St. Petersburg and set it ablaze, Ukrainian President Volodymyr Zelenskyy said, as the city hosted an annual economic forum promoted by President Putin.