Stephen Hawking is working on spacecraft that could travel to ‘Second Earth’ in 20 years

The renowned physicist Stephen Hawking is working on a spacecraft that can travel at a fifth of the speed of light – meaning it could reach the nearest star and send back images of a suspected ‘Second Earth’ within 25 years – in a bid to save humanity. In a speech at the Starmus Festival, Professor Hawking warned humans must soon colonise another planet if we are to survive.
Read more: http://www.independent.co.uk/news/science/stephen-hawking-second-earth-spacecraft-travel-20-years-star-chip-breakthrough-star-shot-a7800991.html?source=Snapzu