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How blood doping works - and how it can still go undetected

Five thousand runners take part in a race at London's Olympic Park, becoming the first people to cross the stadium finish line.

A scheme to help migrants forced to leave relationships as a result of domestic violence is being made permanent, the Home Office says.

Astronomers measure the precise distance to over a quarter of a million galaxies to gain new insights into the influence of dark energy on the Universe.

The lights are going out at some of Scotland's best-known landmarks as part of Earth Hour, a global climate change campaign.

Manchester City boss Roberto Mancini admits he does not trust striker Mario Balotelli, but will continue to play the Italian.

A new government TV campaign in England says invisible second-hand cigarette smoke is harming children and putting them at risk of lung disease.

Work to remove an access cradle on the Forth Road Bridge is completed ahead of schedule.

HMRC letters sent to 1.3m homes advising on changes to the child tax credit system are 'misleading' says a tax reform charity.

Why Libya wants Saadi Gaddafi's London mansion

China arrests six people and disciplines websites over online rumours of a coup, the latest fall-out from a high-level politician's sacking.

Japanese Prime Minister Yoshihiko Noda defends the country's use of the death penalty, days after three death-row inmates were hanged.

Britain and Argentina are preparing to mark the 30th anniversary of the Falklands War amid heightened tensions over the disputed islands

Chinese forestry firm Sino-Forest, accused last year of inflating its revenues and exaggerating its holdings, files for bankruptcy protection in Canada.

A policeman is suspended after a man arrested during the London riots complained he was subjected to racism, assault and harassment.

Aung San Suu Kyi looks set to win her seat in parliamentary elections in Burma, although she says the campaigns have not been free or fair

Americans gripped by lottery fever ahead of the record draw with the jackpot of more than $500million have been buying tickets around the country.

A shop selling equipment to grow cannabis at home opens its first US East Coast outlet in Washington DC, just a few miles from the White House.

The threat of fuel shortages because of planned industrial action has lead to so-called panic buying at petrol stations, but what is the psychology behind 'panic' buying?

Visa, Mastercard and Discover warn that details of credit card holders' personal information could be at risk after a security breach.