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    • It is hard to picture a wee monkey-like adult creature weighing no more than an ounce. But fossils of the 55.8 million-year-old animal, the earliest known primate to inhabit North America, have emerged from coastal sediments in Mississippi. It is even harder to imagine that tiny primates of this primitive kind were able to migrate to this continent all the way from their Asian homeland.
    • The two chimpanzee species, the common chimp and the bonobo, may both be closely related to humans, yet they are rather different from each other behaviorally. Chimpanzee society is dominated by males, while among bonobos, females are dominant and there is less aggression. One illustration of the differences cited by scientists is that chimpanzees occasionally conduct group hunts for other primates while bonobos do not. The hunts, for tree-dwelling monkeys, seem to be more about male bonding and dominance than about nutrition, so it makes sense that the bonobos don’t do it.  Except that new research shows that in fact they do.
    • Deceitful behavior has a long and storied history in the evolution of social life, and the more sophisticated the animal, it seems, the more commonplace the con games, the more cunning their contours.    In a comparative survey of primate behavior, Richard Byrne and Nadia Corp of the University of St. Andrews in Scotland found a direct relationship between sneakiness and brain size.
    • For half a century, social psychologists have been trying to figure out the human gift for rationalizing irrational behavior. Why did we evolve with brains that salute our shrewdness for buying the neon yellow car with bad gas mileage? The brain keeps sending one message — Yesss! Genius! — while our friends and family are saying,    “Well... ”
    • Wild populations of chimpanzees and other great apes are in trouble in many areas, mostly because of hunting and loss of habitat. Conservationists know that other activities, like research and ecological tourism, can help by suppressing poaching and providing an alternative source of income for local people. But to study or see chimps, you have to get pretty close to them. And that can cause problems, too.
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