>"We have observed an object only 20 kilometers across [12 miles], on the other side of our galaxy, releasing more energy in a tenth of a second than the Sun emits in 100,000 years."
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http://www.space.com/scienceastronomy/bright_flash_050218.htmlIt also mentioned that, had this happened at a distance of 10 light-years, it could have caused mass extinctions.
Ours is a violent Universe.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)