Here is the most violent explosions universe

(ANSA) – London, 17 APR–are the most violent explosions in the universe due to the death of stars 10 times larger than the Sun, that trigger the longest ever observed flashes of gamma (several hours). The discovery, announced at the International Conference on the flashes of gamma that is carried out in the United States, is the University of Warwick. Exceptionally powerful cosmic explosions and newly discovered long-lived, occurred at the edge of the observable universe, 7 billions of light years from our galaxy. All rights reserved