Photos: Johannes Eisele/AFP/Getty Images
A pack of Arctic wolf puppies play with each other and explore their enclosure on May 31 while their mother maintains a watchful eye at the Berlin Zoo in Germany.
Born in April, these puppies spent several weeks in their den before finally venturing out into world.
Arctic wolves, a subspecies of the gray wolf, are found in Arctic regions of Canada, Alaska and Greenland. Because they make their home in extremely harsh, remote locations, wild Arctic wolves are rarely threatened by hunting and habitat destruction.
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