Noctilucent clouds shimmer above a hill on Mars in this image from the Curiosity rover from late ... [+] December. The image comes from Dec. 23. The rover snapped multiple pictures of clouds that day.
Floating high above us, it can be easy to give clouds no more than a second glance. But these vast formations of water vapour and ice particles are as varied as the landscapes they appear in. There ...
Those bright particles remained above the clouds and didn’t get washed from the sky by rain; they settled only after several years. Climatologists predicted global temperatures would drop as a result ...