Branson outlines world powered by wind, solar power

Entrepreneur Richard Branson outlined a vision of the world powered by renewable energy and said it would be "pretty dreadful" if a forthcoming UN climate summit is not a success.

Fish leaders are born, not made, study finds

Leadership is an innate quality, said a fish study Wednesday that predicted trouble in animal social groups, also human ones, when natural roles are reversed.

Targeting the social networks of group violence

A strong network of friends may be just as big a factor in acts of group violence as having a charismatic leader or a savvy battle plan, according to a new study.

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