Washington, March 20 : A group of U. S. scientists have created ultra-detailed 3-D images of the eyes of more than 2,000 people from different ethnic groups, 400 of whom have age-related macular degeneration (AMD), hoping that they will pave the way for new diagnostic software that will help get a better look at the abnormalities that cause this condition, and prove useful for developing new treatments.

Washington - Astronauts began work installing a crucial new solar panel on the International Space Station during a spacewalk on Thursday.

The panel is part of a truss segment that will complete the backbone of the station and boost its energy capacity, allowing the resident crew size to double to six astronauts.

US astronauts Steve Swanson and Richard Arnold left the safety of the ISS at 1714 GMT for the planned six-and-a-half hour spacewalk.

Washington  - Astronauts began work installing a crucial new solar panel on the International Space Station during a spacewalk on Thursday.

The panel is part of a truss segment that will complete the backbone of the station and boost its energy capacity, allowing the resident crew size to double to six astronauts.

US astronauts Steve Swanson and Richard Arnold left the safety of the ISS at 1714 GMT for the planned six-and-a-half hour spacewalk. They were to attach the segment to the backbone of the ISS with the help of ISS's motorized robotic arm.

Washington, Mar 19 : A new study has revealed that black girls are 50 percent more likely than white girls to suffer from the eating disorder bulimia.

The findings of the study led by researchers from University of Southern California, University of Maryland and Universitat de Autonoma Barcelona, Spain, challenge the widespread perception that bulimia primarily affects the privileged.

Asian-African girls, in particular, were found to be suffering the eating disorder.

Washington, March 19 : With the aid of a new method developed by scientists in Germany, the output frequency of the atomic fountains clocks has become more stable.

At present, Caesium fountain clocks are the most accurate clocks in the world, furnishing the second accurate to 15 places after the decimal point.

Until they reach this accuracy, caesium fountain clocks, however, need a certain measurement time.

This time has now been considerably reduced with the aid of a new method developed at the Physikalisch-Technische Bundesanstalt (PTB), which makes the output frequency of the caesium fountains more stable.

For excitation of the caesium atoms, the PTB physicists make use of a novel microwave source.