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Nasa astronauts have completed the last spacewalk of the space shuttle era.
A review of published evidence suggests there may be some risk of cancer from using a mobile phone
Geotime software, bought by the Met, collates data from social networking sites, satnavs, mobiles and financial transactions
Europe and the US could be building a spaceship together later this decade.
Less than a decade ago, it fired its first human being into orbit. Now, Beijing is working on a multi-capsule outpost in space. But what is the political message of the Tiangong 'heavenly palace'?
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