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...team of scientists led by Yale University evolutionary biologist Stephen Stearns suggests that if the natural selection of fitter traits is no longer driven by survival, perhaps it owes to differences in women's fertility. "Variations in reproductive success still exist among humans, and therefore some traits related to fertility continue to be shaped by natural selection," Stearns says. That is, women who have more children are more likely to pass on certain traits to their progeny. (See the top 10 scientific discoveries...
Other recent genetic research has backed up that notion. One study, published in PNAS in 2007 and led by John Hawks, an anthropologist at the University of Wisconsin at Madison, found that some 1,800 human gene variations had become widespread in recent generations because of their modern-day evolutionary benefits. Among those genetic changes, discovered by examining more than 3 million DNA variants in 269 individuals: mutations that allow people to digest milk or resist malaria and others that govern brain development. (Watch TIME's video "Darwin and Lincoln: Birthdays and Evolution...
...question is, Are biofuels really green? A pair of new studies in the Oct. 22 issue of Science damningly demonstrate that the answer is no, at least not the way we currently create and use them. In the first study, a team of researchers led by Jerry Melillo of the Marine Biological Laboratory in Woods Hole, Mass., projected the effects of a major biofuel expansion over the coming century and found that it could end up increasing global greenhouse-gas emissions instead of reducing them. In the second paper, another team of researchers led by Tim Searchinger of Princeton University...
When one tour group approached, led by an admissions office student tourguide, a neo dressed in all black explained that no picture-taking was allowed, because Ben Affleck was filming in the Square, and because President Obama would be in town soon. “We can’t have any clumping here,” the neo told the crowd...
...traditional pharmaceutical industry is concentrated in just a couple of states, biotech firms have sprung up just about anywhere you find a university with a research hospital, which gives them a broad political base. "I know that vote hurt me at home," says Ohio Senator Sherrod Brown, who led the unsuccessful fight against the 12-year exclusivity in the Senate HELP Committee...