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.