research

The U.S. government has stopped some experiments with dangerous viruses, saying the risks need to be reconsidered. Key work in one scientist's lab has been halted.

A science superstar at Caltech advises young women to not wait for encouragement to succeed. Just go do it, she says. But her admiring students say that approach doesn't work for everybody.

A 700-year-old caribou dropping from northern Canada holds surprisingly well-preserved viruses. There's no evidence the viruses are dangerous, but they are scientifically interesting.

The DNA in this ancient Siberian leg bone shows that the man had Neanderthal ancestors — yet more proof that humans and Neanderthals interbred. And he lived much farther north than expected.

Cells derived from embryos appear to have improved vision in more than half of the 18 patients who had become legally blind because of two progressive, currently incurable eye diseases.

Researchers have found a way to mass- produce the pancreatic cells that are insulin factories inside the body. The findings could eventually lead to treatments that would transform diabetes care.

They were talented, idealistic risk-takers on the road to what they thought would be important medical discoveries. But when the funding for risk-takers dried up, these two academics called it quits.

Journals usually require researchers to reveal genetic sequences for a toxin that is the subject of a scientific paper. The requirement was waived for a new botulinum toxin because of security risks.