Inequality: What we've learned from the 'Robots of the late Neolithic'

Seven thousand years ago, societies across Eurasia began to show signs of lasting divisions between haves and have-nots. Scientists have now charted the precipitous surge of prehistoric inequality and trace its economic origins back to the adoption of ox-drawn plows.

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More operations are scheduled if doctor is well rested

Researchers have investigated how orthopedic surgeons make decisions regarding surgery, and how the decisions are related to how much of their work shift they have completed. The results show that a patient who meets the surgeon at the end of his or her shift is less likely to be scheduled for surgery.

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Three faces of teen popularity: Being feared, being loved, and being feared and loved

In novel longitudinal study, researchers identified three distinct types of teen popularity: prosocial popular; aggressive popular; and bistrategic popular or Machiavellian. These naughty and nice Machiavellian-like teens were the most popular and were above average on physical and relational aggression as well as prosocial behavior. Just like the 'Mean Girls' in the iconic American teen comedy, they are aggressive when needed and then quickly 'make nice' to smooth out any ruffled feathers.

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Americans would rather drive themselves than have an autonomous vehicle drive them

Are you willing to ride in a driverless car? Researchers studied how Americans' perceived cost of commute time changes depending on who's driving.

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How happy couples argue: Focus on solvable issues first

In marriage, conflict is inevitable. Even the happiest couples argue. And research shows they tend to argue about the same topics as unhappy couples: children, money, in-laws, intimacy. So, what distinguishes happy couples? According to a new study, it is the way happy couples argue that may make a difference.

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