Ultrafine measurements of atmospheric gases could help scientists track down the last sources of CFCs thought to be slowing the recovery of the ozone layer.Openness urged on UK's emissions
The government's chief environment scientist calls for more openness in admitting the UK's cuts in greenhouse gas emissions are an illusion.'Lights out' help migratory birds
A growing number of New York sky-scrapers switch off their lights at night to help reduce the number of migratory birds hitting the buildings.Miracle free-kick 'was no fluke'
Physicists explain one of football's most spectacular free-kicks, showing that Roberto Carlos's 1997 "impossible goal" was not a fluke.Ants protect trees from elephants
A species of acacia tree found in Eastern Africa seems to be protected from elephant damage - by the ants that live on it.BP says oil spill cost up to $8bn
BP says the cost of its Gulf of Mexico oil spill has risen to $8bn - a rise of more than $2bn in the last month alone.Amazon river level at 40-year low
The River Amazon has dropped to its lowest level in 40 years in north-eastern Peru, leaving boats stranded.Worm brain clue to evolution
Researchers map the nervous system of worms to try and understand how the human cerebral cortex evolved.Earl weakens as it nears US coast
Hurricane Earl weakens as it nears the US East Coast, though officials warn it remains "large and powerful".Creation was Godless says Hawking
There is no place for God in theories on the creation of the Universe, Professor Stephen Hawking concludes in a new book.
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