In ordinary circumstances coral reefs are among the most productive ecosystems on Earth, built slowly by animals that appear to be plants. Each coral polyp houses microscopic algae that convert ...

ILULISSAT, Greenland (AP) — Growing up in a village in northern Greenland, Jørgen Kristensen's closest friends were his stepfather's sled dogs. Most of his classmates were dark-haired Inuit; he was ...