The French and Japanese chemists showed how reactions can amplify a small tilt toward one mirror-image form of a molecule, a puzzle at the heart of both drug design and the origins of life.
Ten people blinded by retinitis pigmentosa received an eye injection and special goggles. Six gained meaningful light sensitivity, researchers report, though none can yet make out faces.
Moscow insists there is no danger of an epidemic after a plague-institute employee died of an unexplained pneumonia. The World Health Organization, the United States and the European Union want more information.