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The preference for playing hockey, or house, is far from fixed. Sex differences in the brain are small—unless grown-up assumptions magnify them
Women and men speak their own languages, but research reveals the conversational gender divide is not as stark as it seems
Move over, "mommy brain". Men go through their own biological changes after a baby is born. But dads are programmed to challenge their kids, not coddle them
Transsexuals are illuminating the biology and psychology of sex—and revealing just how diverse the human species really is
Men and women may have different roles when it comes to comedy, but laughter is crucial from flirtation through long-term commitment
Women get sad. Men get mad. Depression comes in many hues
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