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Richard A. Lovett A newly discovered asteroid called 2012 DA14 will pass so close to Earth in February that it might hit a communications satellite, scientists say. "That's very unlikely, but we can't rule it out," said Paul Chodas, a planetary astronomer at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California.

Richard A. Lovett A newly discovered asteroid called 2012 DA14 will pass so close to Earth in February that it might hit a communications satellite, scientists say. "That's very unlikely, but we can't rule it out," said Paul Chodas, a planetary astronomer at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California.

The United States has just undergone the hottest 12-month period ever recorded, according to the environment agency NOAA. While the Pacific Northwest and northern parts of California were actually much cooler than normal over the past year, a vast stretch of the Midwest and East were acutely warm and dry.

The US space agency Nasa is set to test a real-time network of GPS sensors that it hopes will lead to faster, more accurate earthquake analysis. Nearly 500 sensors in the Pacific-coast states of California, Oregon and Washington will be put to use.

The world is getting warmer, countering the doubts of climate change sceptics about the validity of some of the scientific evidence, according to the most comprehensive independent review of historical temperature records to date. Scientists at the University of California, Berkeley, found several key issues that sceptics claim can skew global warming figures had no meaningful effect.