A curious Adelie penguin stands near the Coast Guard Cutter Polar Star on McMurdo Sound, Antarctica, Jan. 7, 2016. During their visit to Antarctica for Deep Freeze 2016, the U.S. military's logistical support to the National Science Foundation-managed U.S. Antarctic Program, the Polar Star crew encounters a variety of Antarctic marine life, including penguins, whales and seals. U.S. Coast Guard photo by Petty Officer 2nd Class Grant DeVuyst.