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Black holes keep 'burping up' stars they destroyed years earlier, and astronomers don't know why (www.livescience.com)
Black holes keep ‘burping up’ stars they destroyed years earlier, and astronomers don’t know why::Years after ripping stars to shreds, 24 black holes suddenly flared up with radio waves in inexplicable ‘burping’ bouts. Half of all star-killing black holes may experience the same.