Photo of the Day: Living on Thin Ice

Beyond Cape Royds, Antarctica, home to the southernmost colony of penguins in the world, lies the Ross Sea, an extension of the Pacific Ocean that harbors more than one-third of the world’s Adélie penguin population and a quarter of all emperor penguins, and which may be the last remaining intact marine ecosystem on Earth. Credit: Andy Isaacson for The New York Times.

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