Resumen de Old monkeys choose to have fewer friends
One's shrinking social circle isn't just a human trait--as monkeys get older, they seem to become more selective about who they spend time with too. Now Julia Fischer at the Leibniz Institute for Primate Research in Gottingen Germany, and her team have found that some monkeys do the same. Observing free-roaming Barbary macaques living in a wildlife park in southern France, they found that 25-year-old macaques spent less than half as much time grooming other monkeys as 5-year-old adults did, and groomed about half as many individuals.
