LakeMoogerah_17-08_02 by Karl Muller on Flickr.
LakeMoogerah_17-08_03 by Karl Muller on Flickr.
Milky Way by Karl Muller on Flickr.
The Cave of Crystals near Chihuahua, Mexico.
Those giant crystals of gypsum (CaSO4) probably grew to their massive size really slowly in a bath of hot water and dissolved minerals. Now that the water has been pumped out by industrial miners, scientists are free to explore…with the help of some ice-cooled orange jumpsuits: The caves average a termperature of 118 F, and 90 % humidity.
(via science-junkie)