The hypothesis could extend the search for extraterrestrial life to include frigid planets with thin atmospheres and underground water.

A warming climate is behind growing floods of glacier meltwater in Alaska’s capital. Scientists say it’s the new normal.

Sun-powered fliers could use photophoretic forces to hover in the mesosphere, gathering data from a region off limits to planes and balloons.

Analysis of the hair used in a knotted device reveals the owner’s simple diet. That suggests commoners, not just the elite, kept records in Inca society.

Found in Splenda, sucralose reduces immunotherapy efficacy via its effects on the gut microbiome, but arginine supplements might counter the outcome.

Women face a small rise in fracture risk within 10 years of stopping therapy, suggesting the need for additional monitoring.

In the lab, higher temperatures during fall migration led monarchs to break their reproductive pause, increasing their risk of death.

Sea silk, once spun from endangered clams, may make a comeback — thanks to discarded fibers from a farmed species. The find could sustainably revive a fading art.

The invasive spotted lanternfly has spread to 17 states and can threaten vineyards. But bats, fungi, dogs and even trees may help control them.

Flu viruses often enter the body through mucous tissue in the nose. Researchers are developing new ways to protect such areas.

In two studies of mice, a molecule called leukotriene helped trigger food-induced anaphylaxis. A drug approved for asthma — zileuton — diminished it.

An analysis of tooth enamel from animals that roamed the western United States about 150 million years ago, including (from left) Allosaurus, Apatosaurus, a herd of Diplodocus and two Camptosaurus, ...