Frost flowers

It was cold again this morning…
The low temperature outside the center was -10°C.
On mornings when it gets this cold, “frost flowers” appear as a common winter sight.
Also called “ice flowers,” they form when moisture in the air attaches to the surfaces of ice, rocks, or other objects and freezes. The frozen moisture then grows in a shape resembling flower pedals.
They appeared as a mysterious phenomenon this morning.
Photo: Frost flowers in Momijidani Valley, Sounkyo Dec. 4