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In many parts of the world, the rate of HIV infection is declining. But not among the indigenous peoples of this Central American country.

More women are joining their male peers among the ranks of oyster farmers. This could be because of growing marine science programs — and a desire to have a hands-on connection with the food system.

Researchers have evidence supporting the existence of plumes of water shooting up from the interior of Jupiter's icy moon Europa.

Severe frostbite claimed Xia Boyu's feet during his first failed attempt in 1975. Then, lymphoma claimed his legs beneath the knee. Still, Xia kept trying — and on Monday, he finally reached the top.

Dave Itzkoff examines Williams' life and death in a new biography. Williams took his own life in 2014; an autopsy later revealed he had Lewy body dementia.

James Harrison, 81, has a rare antibody that can help treat a condition affecting pregnant women. He has donated plasma 1,173 times. But now he has aged out of the donation program.

First Lady Melania Trump underwent an operation Monday at a military hospital just outside of Washington, D.C. Her office said it was to treat a benign kidney condition.

The U.S. selected two evangelical Christians to offer prayers at a ceremony opening its new embassy in Jerusalem. One of the pastors, Robert Jeffress, is known for dismissing other faiths.

Up to 16 million people in the U.S. have undiagnosed or uncorrected vision errors that could be helped by glasses, contact lenses or surgery. But many health plans don't include routine vision care.

First spotted in 2010, a space rock is zooming toward Earth, making a close pass on Tuesday that will see it fly safely by — about halfway between our planet and the moon.