&v=0&aty=4> <http://qph.is.quoracdn.net/main-qimg-cc5e48b92b17ec85=ec77c7a14543ae5?convert_to_webp=true> That the world can end at any instant. 1. Gamma Ray Burst: It's caused by a particularly massive star collapsing=into a black hole, which initiates a supernova explosion, ... Read More » <http://www