817,221 articles

Dawn Spacecraft Beams Back New Images of Asteroid

NASA's Dawn spacecraft has been a fervent photographer, snapping more than 10,000 pictures of the asteroid Vesta since it slipped into orbit around the giant space rock last summer. The views were taken from a distance away -- until now. On Wednesday, the space agency released new images of the hummocky surface as Dawn circled from an average altitude of 130 miles (209 kilometers) above the...

J&J Recalls Motrin Caplets That May Work Slowly

Healthcare giant Johnson & Johnson has issued another recall of Motrin pain relievers, at least the sixth in two years. It's part of a string of more than two dozen recalls of consumer health products, prescription drugs and medical devices over 2 1/2 years. This time, it's because Motrin IB pills may not dissolve and begin working as soon as intended as they approach their three-year...

'Plasmonic nanoantennas' show promise in optical innovations

(PhysOrg.com) -- Researchers have shown how arrays of tiny "plasmonic nanoantennas" are able to precisely manipulate light in new ways that could make possible a range of optical innovations such as more powerful microscopes, telecommunications and computers.

2nd bacterial infection reported in Missouri baby

(AP) -- Authorities investigating a possible link between the death of a Missouri newborn and the formula powder he was fed say another baby in the state may have contracted a rare bacterial infection after consuming prepared formula.

Fossils shed light on evolutionary origin of animals from single-cell ancestors

All life evolved from a single-celled universal common ancestor, and at various times in Earth history, single-celled organisms threw their lot in with each other to become larger and multicellular, resulting, for instance, in the riotous diversity of animals. However, fossil evidence of these major evolutionary transitions is extremely rare.

Researchers develop CAD-Type tools for engineering RNA control systems

The computer assisted design (CAD) tools that made it possible to fabricate integrated circuits with millions of transistors may soon be coming to the biological sciences. Researchers at the Joint BioEnergy Institute (JBEI) have developed CAD-type models and simulations for RNA molecules that make it possible to engineer biological components or "RNA devices" for controlling genetic expression in...

Chemists solve an 84-year-old theory on how molecules move energy after light absorption

The same principle that causes figure skaters to spin faster as they draw their arms into their bodies has now been used by researchers to understand how molecules move energy around following the absorption of light. Scientists now demonstrate for the first time the effect is real and also suggests how scientists could use it to control and predict chemical reaction pathways in...