The two biggest threats to mankind, according to Stephen Hawking

Professor Stephen Hawking says he believes pollution and human “stupidity” remain the biggest threats to mankind, while also expressing his concerns over the use of artificial intelligence in warfare.
Read more: http://www.independent.co.uk/news/science/stephen-hawking-pollution-stupidity-artifical-intelligence-warfare-biggest-threats-mankind-a7106916.html?source=Snapzu