X-ray pulse seen in biggest holes

Electronics' 'missing link' found
Details of a new kind of electronic device, which could make chips smaller, is outlined by scientists.

Black holes reveal more secrets
US scientists say they have worked out how black holes emit plasma jet streams at close to the speed of light.

Final plea on Earth observation
Leading Earth observation scientists urge Gordon Brown to back Europe's environmental monitoring project, GMES.

Rare penguin took over from rival
Human arrival in New Zealand led to the extinction of one penguin species to the advantage of another, scientists suggest.

New radar helps predict rainfall
A team of Oxfordshire scientists develop new technology which will help forecast rain more accurately.