A cosmic gorilla effect could blind the detection of aliens
(PHYSorg.com Space & Earth)

A well-known experiment with young people bouncing a ball showed that observers focusing on counting the passes failed to detect a man in a gorilla suit crossing the screen. According to researchers at the University of Cádiz (Spain), something similar could be happening when astronomers seek intelligent, non-earthly radio signals, which perhaps manifest themselves in dimensions that escape our perception, perhaps through unknown dark matter or energy.