SETI is an acronym for the English Search for ExtraTerrestrial Intelligence, or intelligence Extraterrestre.El search project consists of a parabolic antenna of radio telescope, located in Arecibo ( Puerto Rico ) that captures radio signals in the frequency of the hydrogen, which is the most abundant element in the universe, particularly that of the neutral hydrogen ( the 21 cm 41. This frequency ( that falls in the range of 41 radio; through seamless cloud of gas, dust, atmospheres and galaxies, so finding a regular pattern in this frequency would be a symptom clear of that someone is sending information intentionally. These signals from space are processed at the University of Berkeley and then in small packages of 2 min of recording distributed collaborators volunteers from around the world who use their personal computers to analyze the signals in question in order to determine whether in some of them is a sequence that can be the product of an intelligent being.