"The thin air always diffuses heat less than moist heavy air near the
sea, and at a lower altitude. I'll bet on a cold day you could get
frozen out of the sunlight before you realized."
"And there are no clouds. What a strange dark sky!"
"I've read that there are often yellowish clouds of dust but it is
only at night, when the cold comes with sunset, that moisture clouds
are formed. Nights are too cold for human existence without special
protection."