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PARIS (AFP) – European astronomers said on Wednesday that an anomalous energy signal detected by an orbiting satellite could be a telltale of the enigmatic substance known as dark matter. The researchers, in a study appearing in the British journal Nature, say the hunch is that they picked up a signature of this strange phenomenon, but more work is needed. Some years ago, astrophysicists calculating the amount of matter in the Universe arrived at the startling discovery that ordinary material -- atoms -- comprises perhaps as little as five percent of the stuff in the cosmos. The rest, they believe,...

Telltale gas confirms Korean nuclear test 15:01 23 October 2007 NewScientist.com news service Catherine Brahic Unusually high levels of a radioactive noble gas detected in northern Canada are final confirmation that North Korea detonated a nuclear device underground in October 2006, say UN researchers. The result demonstrates that a UN system to monitor nuclear explosions worldwide is up and running, and able to "sniff" such events from a great distance. Atmospheric levels of an isotope of the noble gas xenon suggest the test was relatively small and carried out underground. On 3 October 2006, the government of the Democratic People's...

Reid: parents must heed 'tell-tale signs' of extremism (Filed: 20/09/2006) John Reid, the Home Secretary, has challenged British Muslims to do more to identify potential terrorists. John Reid was heckled during the speech Mr Reid met an audience of specially-invited Muslims in Leytonstone in London's East End to urge parents to "look for the tell-tale signs" of radicalisation in their children. During the speech a small protest was made by two men. One man, later identified as activist Abu Izzadeen, stood up and began heckling Mr Reid, calling the Home Secretary an "enemy" of Islam, before being led from the...