The iridescent cloud reveals new clues about ice formation in the Martian atmosphere (no little green men, sorry).

Welcome to cwg.live, updated around-the-clock by Capital Weather Gang meteorologists … Happening now: We could see some light ...

Curiosity rover images show iridescent clouds on Mars, helping scientists explore atmospheric and climate dynamics.

Friday in D.C. almost insisted on recognition as one of winter’s special days, one with an almost-full “snow moon” casting its silver light on a city and an area still covered in spots by snow. Only ...