Washington: American warships are moving into position to try to shoot down an out-of-control spy satellite as early as Wednesday before it tumbles into the Earth's atmosphere, Pentagon officials said here on Tuesday. Armed with two specially modified interceptor missiles, the

In March last year, two million Sydney residents switched off lights and appliances for an hour. The idea was to send a message about arguably the greatest threat facing the planet: global warming. The move clearly captured the imagination of people across the world, because this year 23 other cities

US lawmakers have said that the nuclear deal with India cannot go through the US Congress if it does not reach there by June. The warning was sounded by a group of influential senators

If two scientists at Los Alamos National Laboratory are correct, people will still be driving gasolinepowered cars 50 years from now, churning out heat-trapping carbon dioxide into the atmosphere

Less than a week after concerns were raised in the Senate Foreign Relations Committee on the Bush Administration's efforts to obtain a

Canberra: As many as 30 million people are tipped to switch off lights and televisions around the world to help fight climate change with 24 cities joining Earth Hour on March 29, environment group WWF said on Wednesday. Following last year's Earth Hour in Australia, where 2.2 million Sydneysiders powered-down for an hour, cities including Atlanta, San Francisco, Bangkok, Ottawa, Dublin, Vancouver, Montreal and Phoenix have also signed on, WWF said.

New York: Kids who live in neighborhoods with heavy traffic pollution have lower IQs and score worse on other tests of intelligence and memory than children who breathe cleaner air, a new study shows. The effect of pollution on intelligence was similar to that seen in children whose mothers smoked 10 cigarettes a day while pregnant, or in kids who have been exposed to lead, Dr Shakira Franco Suglia of the Harvard School of Public Health in Boston, the study's lead author, said.

Washington: Physicists have developed a new atomic clock that surpasses previous records for accuracy of current US time standard, making it the world's most accurate atomic clock. Developed by physicists at JILA, a joint institute of the Commerce Department's National Institute of Standards and Technology (NIST) and the University of Colorado at Boulder, the new clock is based on thousands of strontium atoms trapped in grids of laser light.

It Formed 700 Million Years After Our Universe Began, Claim Astronomers New York: Astronomers have discovered a galaxy which they claim is one of the youngest and brightest ever seen right after the cosmic "dark ages', just 700 million years after the beginning of our Universe. The Hubble Space Telescope has captured the image of the infant galaxy with a redshift significantly above 7, using a natural zoom lens, the Nasa said.

SAN FRANCISCO, FEBRUARY 11: US Government scientists have discovered a new way that HIV attacks human cells, an advance that could provide fresh avenues for the development of additional therapies to stop AIDS, they reported on Sunday. The discovery is the identification of a new human receptor for HIV. The receptor helps guide the virus to the gut after it gains entry to the body, where it begins its relentless attack on the immune system.