Generosity leads to evolutionary success, biologists show

With new insights into the classical game theory match-up known as the "Prisoner's Dilemma," University of Pennsylvania biologists offer a mathematically based explanation for why cooperation and generosity have evolved in ...

Internet 'trolls' face being named under new bill

Websites such as Facebook and Twitter will receive greater protection from lawsuits if they identify internet "trolls" accused of defaming others under a bill being debated in Britain's House of Commons on Tuesday.

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