Stephen Hawking helps unveil interstellar travel project

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Stephen Hawking helps unveil interstellar travel project
A Russian billionaire has enlisted physicist Stephen Hawking to help him launch a futuristic plan for seeking life in outer space.

Called the Breakthrough Starshot mission it envisages a mother ship launching thousands of minute spacecraft into space which will then use lasers from Earth to travel at 20% the speed of light to the nearest star system.