Scientists found that male rhesus monkeys have sex more frequently with other males than females. This behavior could provide the monkeys with an evolutionary edge over heterosexual counterparts. The researchers reported 72% of the 236 male monkeys either mounted, or were mounted, by other males, whereas only 46% participated in heterosexual sex. Moreover, these male monkeys weren't strictly homosexual. Gay sex in male monkeys is partially heritableBy using genetic tests and family trees, they found that same sex behavior was 6.4% heritable.

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Persons: China Istvan Kadar, weren't, Vincent Savolainen, Savolainen Organizations: Service, Imperial College of London, New Locations: Wall, Silicon, Puerto Rico, China