ABCs from Space: A

A, what begins with A? There is Antarctica and the Arctic, algal blooms, acid rain and the atmosphere. And aerosols altering an astronaut’s view of this ancient assemblage of rock in a state adjacent to Arizona! An astronaut captured this photograph of Utah’s Green River doubling back on itself—a feature known as Bowknot Bend—from the International Space Station on Jan. 22, 2014.