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. This hypothesis is considered spurious by most scientists[1]due to both lack of concrete positive evidence and negative evidence. It is also generally rejected by religionists for its disruption of the faith system.It is often a target for intentional hoaxes.

See Also

Extraterrestrial Life