Too many candidates spoil the stew

This election year has produced 17 Republican presidential candidates, which on its surface may appear to give the party a competitive advantage. Evolution, however, disagrees.

Research reveals why humans like to share

Human intelligence and knowledge depends on how we collect and use sharable resources, according to scientists from The University of Manchester.

Big sperm don't always win the race

When females mate with more than one male, each one's sperm has to compete to get to her eggs. Until now, researchers had thought the fastest sperm would dominate.

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