For a mother brown bear in Scandinavia, few sights are as terrifying as a strange male. A new study suggests that smart mama bears have found a surprising way to protect their young. To shield her cubs, mom just has to raise them near an adult bear’s number one enemy: humans.
Over one-third of all brown bear cubs will die during the mating season. And over 90 percent of those fatalities will be at the claws and maws of unrelated males.
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