Astronomers have identified the vivid scar of a cosmic catastrophe: a blue arc thousands of light years long produced when a galaxy pulled in a smaller satellite galaxy and tore it apart.

The streak is composed of clusters of young blue stars that formed as the larger galaxy, Centaurus A, absorbed the smaller galaxy about 200 million to 400 million years ago. Researchers will report in the December Astronomical Journal that their discovery suggests absorption of smaller galaxies may be a sig

While electronic circuits and nanomachines grow ever smaller, batteries to power them remain huge by comparison, as well as short-lived. But now Cornell University researchers have built a microscopic device that could supply power for decades to remote sensors or implantable medical devices by drawing energy from a radioactive isotope.

The device converts the energy stored in the radioactive material directly into motion. It could directly move the parts of a tiny machine or could generat

The world speed record for protein folding apparently goes to an unusually tiny specimen that traces its origins to Gila monster spit.

So reports a team of University of Florida researchers in a paper published this week in the online edition of the Journal of the American Chemical Society. Though significant mainly from a purely scientific standpoint, the finding eventually may be important in researchers’ understanding of the underlying causes behind a host of maladies.

Prote

New Report Discovers Carbon Trading to Be Win-Win Proposition for Poor Villagers, Big Business, and for Slowing Climate Change

As the next major meeting on global climate change opens in New Delhi next week, a potentially controversial report concludes that deals to counteract the carbon emissions of the smokestack industry could benefit more than the environment. It reveals that carbon-trading deals in forestry could sharply reduce poverty among the rural poor, while also providing

Are European forests, soil and grass part of the solution for dealing with carbon dioxide (CO2) emissions? Today the European Commission presented the CarboEurope research initiative in Valencia (Spain). It is a cluster of 15 research projects supported by the European Commission with a budget of €25 million. The project brings together around 160 research institutions from over 20 countries. It looks at whether the biosphere, and above all forests, can reduce the concentration of carbon dioxide i

New results from experiments at a unique ecology facility show that plant communities are dramatically altered by changes to the type of animal species living among their roots, but that key ecosystem measurements such as overall agricultural yield or the amount of soil carbon stored are unaffected.

According to the results of a three year study into the processes of experimental grassland ecosystems published in the journal Science today, changes to the makeup of soil communities from small