29 April 2011 Last updated at 23:44 ET

Nasa delays Endeavour's missionKelly and Obama

Nasa has delayed the launch of its Endeavour shuttle by at least three days because of technical problems in the last hours before lift-off.


Sample bottle and lakeBoom and bust flags eco-collapse

An experiment in a US lake shows that major ecosystem changes could be predicted, with the right monitoring.

Pig in mud (Image: Science Photo Library)Pigs have 'evolved to love mud'

A scientist is suggesting that a pig's love of mud is more than just a way to keep cool. Earth News

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    Space shuttle to deliver Alpha Magnetic Spectrometer to the International Space Station

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