Noctilucent clouds, also called polar mesospheric clouds, sit just high enough in the atmosphere to capture the tiniest bit of sunlight. NASA’s Aeronomy of Ice in the Mesosphere (AIM) spacecraft took this photo of the distinctive looking clouds over Antarctica this week. NASA Earth Observatory map by Jesee Allen
is the Science Editor at Popular Science. She has a particular interest in brain science, the microbiome, and human physiology. In addition to Popular Science, her work has appeared in The New York Times, Scientific American, and Scholastic’s Science World and Super Science magazines, among others. She has a bachelor’s degree in neurobiology from the University of California, Davis and a master’s in science journalism from New York University's Science, Health, and Environmental Reporting Program. Contact the author here.