There is a reason for that. All clouds develop because of the water cycle. Moisture is lifted into the atmosphere after the Sun heats the ground. If you think about it, the Sun is very efficient ...

SEE ALSO: Sunshine and clouds to kick off a long week of warm temperatures and dry conditions "They develop as a result of ice crystals slowly falling through the air, reflecting the sun’s rays ...

While sunsets on Mars are uniquely moody, NASA 's Curiosity rover has captured a stunning image of a martian sunset, featuring light rays that illuminated a bank of clouds as the sun set over the ...