How monogamous are humans compared to the rest of the animal kingdom? Somewhere between the Eurasian beaver and a meerkat, according to a new study published in the journal Proceedings of the Royal Society: Biological Sciences, which ranks different species of animals in a “premier league of monogamy.” The research, led by University of Cambridge evolutionary anthropologist Mark Dyble, analyzed data from 103 human societies and 34 mammal species to create a “league table” of monogamy by comparing the number of sibling pairs born to the same parents. Humans ranked seventh among those analyzed, with 66 percent of siblings sharing both a mother and a father—making our species less monogamous than the Eurasian beaver but more than the Lar gibbon, meerkat, and gray wolf. Topping the list with 1

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