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

The Webb telescope found that a far-off little red dot is the oldest known black hole, shrouded by gas that could help explain the ruby color.

A Kenyan site shows early hominids transported stone 13 kilometers for toolmaking as early as 2.6 million years ago.

Solve our latest interactive crossword. We'll publish science-themed crosswords and math puzzles on alternating months.

Golden apple snails can regrow full, functional eyes. Studying their genes may reveal how to repair human eye injuries.

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

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.

In The Martians, journalist David Baron recounts scientific and public debate over purported intelligent life on the Red Planet.

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

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