twin of the sun: Astronomers have found the Sun's long-lost twin. The star HIP 56948, considered to be the best solar twin, is about 200 light-years away. The mid-sized star is one of many in the

Germany has issued the world's most ambitious climate target: a 40 per cent greenhouse gas emissions reduction from its 1990 levels by 2020. One of the major goals of the Integrated Energy