Science Extremely short, sharp flash of radio waves from unknown source in the universe, caught as it was happening — ScienceDaily Posted on January 21, 2015 by johnbarleycorn12 Extremely short, sharp flash of radio waves from unknown source in the universe, caught as it was happening — ScienceDaily. Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading...