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Last updated on April 18, 2014 at 21:21 EDT

Latest Jane Lancaster Stories

2008-03-20 23:55:00

News of politicians' extramarital affairs seems to be in no short supply lately, but if humans were cut from exactly the same cloth as other mammals, a faithful spouse would be an unusual phenomenon. Only 3 percent to 5 percent of the roughly 5,000 species of mammals (including humans) are known to form lifelong, monogamous bonds, with the loyal superstars including beavers, wolves and some bats. Social monogamy is a term referring to creatures that pair up to mate and raise offspring but...