Rice and beans is a cultural icon in many parts of the world. It's pretty healthy and relatively cheap. It may keep people from starving, as TV personality Sean Hannity suggests, but it doesn't have all the nutrients a body needs for life.
The paper describes experiments that suggest just a few genetic changes could potentially make a bird flu virus capable of becoming contagious in humans, and causing a dangerous pandemic. A fierce debate has raged over this study for months, because of fears that the work might provide a recipe for turning bird flu into a bioweapon.
Years after more than 40 patients with HIV received immune cells designed to attack and kill cells infected with HIV, the specialized cells are still present in their bloodstreams. There's been no sign the cells, a form of gene therapy, caused any serious side effects.
As childhood obesity rates continue to rise, schools and parents look for ways to get kids off the couch. But the number of students who walk or ride their bikes to school has dropped from 48% in 1969 to just 13% in 2009. David Darlington talks about his Bicycling article, "Why Johnny Can't Ride."
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