Mysterious Green Swirls Spotted Off Antarctic Coast

Late last month, a NASA satellite flying over East Antarctica spotted swirls of green off the Princess Astrid Coast that left experts wondering just what it was.

Such a pattern usually indicates a bloom of tiny plantlike organisms called phytoplankton, which form the base of the ocean food chain. Such blooms are common along the Antarctic coast, but typically form in early December, in the austral spring, not so late in the summer season, according to experts consulted by NASA.

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