The Arctic Ocean is Earth’s northernmost body of water. It encircles the Arctic, and flows beneath it. Most of the Arctic Ocean is covered by ice throughout the year—although that is starting to change as temperatures climb. Pale and stark on the surface, the Arctic Ocean is home to a stunning array of life. Though…

Just a few years ago, it looked as if humpback whale populations in the Pacific Ocean were booming. Receding sea ice due to climate change—though bad for polar bears and other wildlife—had lengthened the summer foraging season for hungry whales, and the U.S. government decided that certain populations had recovered enough to be taken off…