Is that frazil, grease or shuga? Siobhán Johnson, a sea ice scientist, explains how to tell the difference, should you ever find yourself in icy seas. Our journalists are aboard the Araon, a South Korean icebreaker, with nearly 40 scientists from around the world. They've reached Antarctica, where they will be studying the fastest-melting glacier. As the ship headed into the sea ice zone around the continent, penguins and seals started to appear. Video by Raymond Zhong, Chang W. Lee, Christina Thornell, David Seekamp, Leila Medina and Stephanie Swart/The New York Times #nytantarctica #ice #penguins #travel #science