That's news to me

Grigory Perelman, the Russian who seems to have solved one of the hardest problems in mathematics, has declined one of the discipline's top awards. [...] The Fields Medals are regarded as the equivalent of the Nobel Prize for mathematics. They are awarded to mathematicians under the age of 40 for an outstanding body of work and are decided by an anonymous committee

Dark matter - which does not emit or reflect enough light to be "seen" - is thought to make up 25% of the Universe. [...] What the researchers have done is, in effect, to identify the gravitational "signature" of dark matter. This signature was created by dark matter and ordinary matter being wrenched apart by the immense collision of two large galaxy clusters.

"The movie industry doesn't just make films for boys [...] Most of the Sims players are girls - 70% are women under 25". Mr Gardner said the industry needed to "create some mega hits in the girl space."

Japan has suspended US long-grain rice imports after supplies were found to contain a genetically engineered variety that is unapproved for sale.

The UN chief prosecutor in The Hague has condemned Serbia's failure to hand over Gen Ratko Mladic as seven other Bosnian Serbs face the judges again.

HIV disarms the T cells sent by the body to fight it by flicking a molecular switch on the cells. In the laboratory, the researchers were able to block this switch and restore T cell function, Nature reports.

At least three people died and more than 250 were injured when a storm lashed Hungary's capital, Budapest, as huge crowds watched a firework display.

The Tories are calling for restrictions on immigrant workers from Bulgaria and Romania ahead of them joining the EU.

Core needle biopsy is already commonly used to sample suspect breast tissue for doctors to examine microscopically. Looking at gene patterns in the samples too may help spot more aggressive cancers needing intensive treatment, but proof of this new test is limited.