Across much of the world, loneliness increases from middle age to later years. That trend is reversed in the United States, a new study shows.

Rising global temperatures are driving the sharp decline in terrestrial water storage. This trend isn’t likely to change, scientists say.

Autism rates are higher than ever before, probably because of more expansive and sensitive diagnoses. Those numbers highlight the need for more support for people with autism.

An overlooked Antarctic water system could raise sea levels by more than 2 meters by 2300, computer simulations show.

A potential dark galaxy — one made primarily of dark matter — may have been spotted in the local universe. Dark galaxies are theoretical, starless systems whose discovery could help ...

An archaeological site in Germany suggests communal hunting and complex thinking emerged earlier in human evolution than once thought.

While solitary black holes should be common, they are hard to find. The one in Sagittarius revealed itself when it passed in front of a dim background star, magnifying the star’s light and slowly ...

Satellite data reveal a link between the amount of black carbon in the atmosphere and rates of Antarctic sea ice loss in recent years.

Editor in chief Nancy Shute discusses the booming online market for semaglutide, new findings on how early humans used sophisticated thinking and whether Spinosaurus could swim.

Scientists are working on AI technology that has brain-inspired hardware, architecture or algorithms. Such neuromorphic AI could be nimbler, more efficient ...