Cholesterol-rich plaques tend to accumulate in those same areas, where there's the most stress and turbulence. Finding a way to get the cells in high-risk areas to align themselves might help the body prevent plaques from forming. A few years ago, a chimpanzee DNA analysis study published results that suggested female chimps were completely loyal to their hierarchical group when it came to mating. The news, based on analysis of newborn chimps which showed many had mystery fathers, rocked the accepted theory that female chimps live together in one group, most likely mating with the dominant male. Now, based on further analysis of the original data, the sordid tale of forbidden love turns out to have been a mistake.
Female chimps do stay close to home, and generally mate within the group.
The study also confirms the idea that it's best to be a dominant male, because the dominant chimps fathered half of the babies born. Sex darts increase the chance of becoming a father Scientists have discovered a plausible reason for the snail's strange mating behaviour. The dart improves a male's chances of fathering offspring. Researchers have found that a chemical in the mucous around the dart actually changes the female's body, resulting in her retaining more of the male's sperm, which increases his odds of becoming a father. The paternal opportunity does depend on firing the dart accurately enough to hit the female snail and sink in where the mucous can go to work.