Technique to trace persistent CFCs
Ultrafine measurements of atmospheric gases could help scientists track down the last sources of CFCs thought to be slowing the recovery of the ozone hole.

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.

Greatest 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.

Worm brain clue to evolution
Researchers map the nervous system of worms to try and understand how the human cerebral cortex evolved.

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.

Ancient reef uncovered in Pacific
An ancient reef may provide scientists with clues about what will happen to coral when sea temperatures rise.

Floods swamp south Sudan region
Some 57,000 people have been forced from their homes because of dramatic floods in south-western Sudan over the past month, officials say.

Rare Roman lantern found in field
A metal detecting enthusiast finds what is believed to be the only intact Roman lantern made out of bronze ever discovered in Britain.