Somehow I was able to see three-dimensional and frost. On the slope of the Kamchatka volcano land with a slight crunch sags under the feet of one to two centimeters. It was found that a thin surface layer of the soil was raised delicate icy twigs sticking thick as bristles on a toothbrush. Neither before nor after I did not have to see such a curious crystallization of water vapor, though they write that in the mountains of this phenomenon is not so rare. Even metals form similar structures metallurgists: the whole world is well-known so-called "Chernoff tree" - tree splice iron crystals grown in the shell casting.