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A study shows that not only do astronaut's genes change in space, but they have the potential to remained changed even months after the astronaut is back on Earth.

When President Trump claimed that past presidents did not call family members of fallen U.S. service members, it caused a backlash. On Tuesday he addressed the issue again, defending his false claim.

A meteor streaked over southeast Michigan Tuesday night, creating a sonic boom so loud it shook houses. After seeing the spectacle in the night sky, thousands of people took to social media to share what they witnessed.

The apology comes after she signed a letter last week about the #MeToo movement and she and other co-signers made comments that some harassment victims found offensive.

Thousands of documents related to the 1963 assassination of President John F. Kennedy were released Tuesday. Presidential historians didn't expect any bombshell revelations.

Inside boxes found in the basement were documents "intended to consolidate and propagate Adolf Hitler's ideology in Argentina," the court said. Supreme Court President Horacio Rosatti has ordered a review.

Sandra Grimes died at the age of 79. Her work was crucial in catching a Soviet agent who "caused more damage to the national security of the United States than any spy in the history of the CIA."

Last night's Billboard Latin Music awards honored Bad Bunny, who received the lifetime achievement award. When the legendary Rita Moreno handed it off, the moment was like the passing of a baton.

Bob Weir, who helped build the Grateful Dead from the Haight-Ashbury scene into a cultural institution, has died at 78.

NPR's Scott Simon looks at just how prevalent guns have become in American society, compared to smartphones and cars.