"SETI" is the acronym for the organization called  "Search for Extra-Terrestrial Intelligence".  The goal of SETI is to find signs of intelligent life beyond earth by monitoring light and radio waves hitting earth from space and searching them for patterns.  However, in 2004 their director admitted that they really don't know what type of pattern to look for.  Is it possible that in their zeal to validate their belief of life beyond earth that many, like those in SETI have missed the many non-random patterns which characterize life and living things on this planet?  Perhaps they have simply missed the obvious, even while searching for it.  Uplook Magazine, October-November 2004, p.21.  References:  Scientific American, July 2004, Ask the Experts, p. 120.