Mark Bergin | Biodiesel advocates champion soybean oil and recycled French fry fat-but problems lurk beneath the hype
States and drug companies back down on vaccine mandates
Becky Perry | Global warming's the hot topic, but one climate scientist exposes dissension in the expert ranks. "We wonder if we've oversold the science"
Researchers say belief and behavior cause changes to the brain
Priya Abraham | A new Congress adds momentum to an odd alliance of conservative "cheap hawks" and liberal "tree huggers"
Lynde Langdon | Ten years since their first success, cloning experts operate in an ethical no man's land
Lynn Vincent | Pastor Rick Warren stirs passions-and politics-at church AIDS summit
Birth control: Will men remember to take pills?
Jamie Dean | Sex selection in New York City soon will be all about how he-she?-is feeling
Scientists get more than they bargained for with embryonic stem cells
