Routine tests in the third trimester may catch missed cases and flag the need for treatment that reduces a baby‘s risk of getting HIV to near zero.

A trove of fossils, including a penis worm with a spiked, invertible throat, suggests this spot may have been a cradle of Cambrian evolution.

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Megaflash hot spots include the U.S. Midwest and southeastern South America, site of the previous record-holder, a 709-kilometer-long bolt over parts of Brazil and Argentina. That lightning still ...

Geologists unpack why the magnitude 8.8 temblor — the sixth largest ever recorded — fomented waves that reached Japan and Hawaii but caused little damage.

A quantum computer has reached new heights. The first quantum computer in space is now orbiting Earth on a satellite, scientists report. Launched on June 23, the computer had to be designed to fit in ...

A leftover from microbes’ meals is linked to early heart disease in people. In mice, it contributed to plaque buildup in the arteries.

The starchy vegetable emerged 9 million years ago in the forming Andes mountains — a result of natural interbreeding between an ancient tomato plant and potato-like species that lacked the engorged ...

“It feels lovely for [the] first 15 minutes, especially in winter,” Rykaczewski says. “After about two hours, it becomes [a] bit, well, sweaty.” ...

Studies suggest that people who had seasonal flus or vaccinations have low antibody levels against H5N1 bird flu.

An infinity symbol–shaped galaxy hosts an active supermassive black hole. The growing giant may have come from the aftermath of a galactic smashup.

GLP-1 drugs for diabetes and weight loss are difficult for some people to inject weekly. A new slow-release gel, tested in rats, could help.