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Page last updated at 09:20 GMT, Friday, 11 May 2012 10:20 UK

Tweeting to a planet near you


Why is an artist planning to send tweets to the closest planet to Earth which might contain life?

Nathaniel Stern, associate professor at the University of Wisconsin, describes the project and Anu Ojha, Director of the National Space Academy in Leicester, explains whether it will work.

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