Postcards from the Planet

This NASA image shows the frozen Yukon River in Alaska.

“Nature works in patterns, and one of those patterns is imprinted on the frozen Alaskan landscape in this true-color image from January 11, 2010. Like a winter-bare tree, a network of roots, or the veins, arteries, and capillaries that enclose an organ, the Yukon River branches across the snowy Yukon Delta to the Bering Sea.” As this NASA description says, we often see repeating patterns in nature. The bare branches of trees on a snowy winter day echo the frozen river and its tributaries…

An icy woodland stream still has enough open water to reflect the trees above.