Yale Environment 360: Antarctica's Emperor penguins are facing dramatic declines by the end of the century and should be given endangered species status because of the threats posed by climate change, according to an international group of scientists. If sea ice declines at the rates projected by current climate models, at least two-thirds of the colonies will likely shrink by more than 50 percent by 2100, the researchers say. That conclusion follows a 50-year study in eastern Antarctica of Emperor penguins, an iconic...