In nature's most brutal parenting class, male grizzlies aren't winning any "Father of the Year" awards! Young male bears literally risk death if they hang around dad too long. Papa bear's philosophy? "It's not personal, kid—it's just natural selection."
Male grizzlies will actually kill cubs that aren't theirs to bring females back into estrus, and they'll chase off their own teenage offspring to eliminate future competition. Talk about harsh family dynamics! Darwin would be like "yep, checks out."
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