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eshockNew Scientist: A lust for vengeance may be hardwired into the male brain. Scans of brain activity suggest that men experience greater satisfaction than women in seeing cheaters get their comeuppance – at least when the punishment is physical.

Tania Singer of University College London and colleagues used a functional magnetic resonance imaging (fMRI) machine to analyse the brain activity of 32 volunteers after their participation in a simple game, called the Prisoner's Dilemma. Click here to continue reading.