In billions of years, the sun will expand to engulf the Earth and life on this planet will become impossible. But there a™’s space debris and space situational awareness activities. He is also a member of the UK's delegation to the UN Space Mission Planning Advisory Group, a roundtable of experts who discuss how to prepare an international response to near Earth objects (ie asteroids). This talk was filmed at the Royal Institution on 28 June 2017. The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter Product links on this page may be affiliate links which means it won't cost you any extra but we may earn a small commission if you decide to purchase through the link.