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.

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.

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

Alpha Centauri A, four light-years from Earth, may host a gas giant. If confirmed, no Earthlike planets orbit in the star’s habitable zone.

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

A gene called IBSH1 helped spreading earthmoss thrive at high gravity, hinting at how plants adapted to photosynthesize on land.

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

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

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.