Post-menopause orca mothers protect their sons from being injured by other orcas

ScienceDaily
Jul 20, 2023, 4:48 pm41 pts
Female killer whales live up to ninety years in the wild, and most live an average of twenty-two years after menopause. Scientists have long wondered why humans and some whale species spend a significant portion of their life not reproducing. Previous studies show that, even after having their last calf, killer…

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