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Stefan Christmann

Before she leaves to hunt at sea for two months, a female emperor penguin assists her partner in transferring her egg onto his feet. The delicate routine must be quick or the egg might freeze. The flightless birds depend on Antarctica’s frozen sea ice shelves to find mates, breed, and raise chicks. But as temperatures rise, the shelves are vanishing. (From “As ice melts, emperor penguins march toward extinction,” May 2020.)

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