Night Clouds Warm Red Planet

Nighttime clouds detected for the first time on Mars help to keep the planet’s surface warm after sunset when temperatures drop, a new study suggests.
The nocturnal clouds are five times thicker than their daytime counterparts and hover close to the ground, almost like a fog.
The study, conducted by researchers at NASA and the National Oceanic and Atmospheric Administration (NOAA), is detailed in the Feb. 1 issue of Geophysical Research Letters.