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Updated at 2:23 p.m. ET

President Trump delivered a stern warning to North Korea's leader at the United Nations General Assembly Tuesday.

Updated at 11:30 a.m. ET

Hurricane Maria is barreling toward the Virgin Islands and Puerto Rico as a "potentially catastrophic" Category 5 hurricane and is forecast to approach those islands Wednesday.

On the island of Dominica, which was raked by the storm late Monday, the prime minister says that "initial reports are of widespread devastation. So far, we have lost all what money can buy and replace."

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

Sarah Dudas doesn't mind shucking an oyster or a clam in the name of science.

But sit down with her and a plate of oysters on the half-shell or a bucket of steamed Manila clams, and she'll probably point out a bivalve's gonads or remark on its fertility.

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