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Work has finished on the world's largest radio telescope, which will hunt for extraterrestrial life and explore space. 

China fitted the final of 4,450 panels into the centre of the 500m-wide Aperture Spherical Telescope, or FAST, over the weekend.

The telescope, which cost $180 million (£135 million) and took five years to build, will be switched on from September.

The Telegraph

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