Daily Postcard: When supercooled fog meets freezing temperatures, ice can slowly build up on trees, rocks, and other surfaces, transforming the landscape into something magical. This enchanting phenomenon, known as rime ice, forms as tiny droplets of fog freeze on contact, often creating a delicate, sugar-coated appearance like this scene on Jan. 26, 2026 at Valles Caldera National Preserve. Photo by Andrew Gordon/U.S. Dept. of the Interior