By GAIL VINES Despite its unrivalled popularity as a contraceptive, the Pill remains a variation on a now antiquated theme. (newscientist.com)
Overall, these twin studies suggest that genes explain between 30 and 60 percent of altruistic tendencies, with the remaining variation coming from cultural or social effects. (scientificamerican.com)
«Nutrients are important for explaining the remaining variations in species distribution that is not explained by drought tolerance,» she adds. (scientificamerican.com)