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Planetisms that don't know enough to keep quiet, get eaten." [156] In Liu Cixin's 2008 novel The Dark Forest, the author proposes a literary explanation for the Fermi paradox in which many multiple alien civilizations exist, but are both silent and paranoid, destroying any nascent lifeforms loud enough to make themselves known. [157]
The dark forest hypothesis is distinct from the Berserker hypothesis in that under the former, many alien civilizations could still exist provided they keep silent. The former can be viewed as a special case of the latter, if the deadly probes are (e.g. due to resource scarcity) only sent to star systems that show signs of intelligent life. [8]
As for the possible risks, theoretical physicist Stephen Hawking warned in 2010 that humans should not try to contact alien life forms. He warned that aliens might pillage Earth for resources. "If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans", he said. [159]
The famous Drake equation allows us to estimate how many alien civilizations might exist in the Milky Way. It looks like this: N=R*(fp)(ne)(fl)(fi)(fc)L, with each variable defined below.
Belief in aliens has persisted for centuries, and one-third of Americans believe that UFOs people have spotted have been alien spacecraft visiting Earth from other planets or galaxies, according ...
Although stellar parallax does exist, stars are too far away from Earth, more than Greeks considered, to be noticeable by the naked eye. [3] Plato (left) and Aristotle (right) opposed the idea of a plurality of worlds. The Greeks discussed as well the possible existence of other worlds, but did not consider the planets as such.
In a bold prediction, one of the world's leading scientists claims NASA is close to discovering whether alien life truly exists. Dr. John Grunsfeld, the physicist and former astronaut who heads ...
2003: In South Park 's inaugural episode of season seven, "Cancelled", aliens refrain from contacting Earth because the planet is the subject and setting of a reality television show. Unlike most variations of the zoo hypothesis where contact is not initiated in order to allow organic socioeconomic, cultural, and technological development, the ...