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:
“It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young.”
—Konrad Lorenz (1903–1989)