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    How Penguins Huddle To Keep Warm And Cosy

    So toasty.

    It's cold down in Antarctica, so penguins have to huddle together to keep warm.

    Now scientists have modeled how emperor penguins stay so close together in their cosy huddles.

    The waves also mean that smaller huddles can eventually become much bigger.

    Emperor penguins are the only vertebrate species that breed in the -50C temperatures of the Antarctic winter, so keeping warm is a priority.