Harvard professor warns of apocalypse threat BIGGER than NASA's feared asteroid impact THE HEAD of NASA has urgently come out to warn of the apocalyptic danger of an impending asteroid collision within decades - but one Harvard professor fears an even more impending threat. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:We need to leave Earth or humanity will DIE, warns Stephen HawkingOptions for Periods Include Cups and Special UnderwearWATCH the Leonid Meteor Shower 2016 live online hereStudy Shows Promise for Expensive Cholesterol Drugs, but They Are Still Hard to ObtainJohn Kerry’s Antarctica Visit Highlights a Continent, and Climate Policies, Under ThreatIntelligent aliens will have merged with machines and we will too, states expert