The extraterrestrial hypothesis (ETH) is the hypothesis that some unidentified flying objects (UFOs) are best explained as being extraterrestrial life or non-human aliens from other planets occupying physical spacecraft visiting Earth.
Read more about Extraterrestrial Hypothesis: Etymology, Chronology, Analyzing ETH, Opinions Among Scientists, NASA, Conspiracy, Official White House Position
Famous quotes containing the word hypothesis:
“On pragmatistic principles, if the hypothesis of God works satisfactorily in the widest sense of the word, it is true.”
—William James (1842–1910)