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Frank first approached Schmidt to discuss how to detect alien civilizations via their potential impact upon climate through the study of ice cores and tree rings. They both realized that the hypothesis could be expanded and applied to Earth and humanity due to the fact that humans have been in their current form for the past 300,000 years and ...
Proponents cite ancient mythologies to support their viewpoints based on the idea that ancient creation myths of gods who descend from the heavens to Earth to create or instruct humanity are representations of alien visitors, whose superior technology accounts for their perception as gods.
Xenoarchaeology, a branch of xenology dealing with extraterrestrial cultures, is a hypothetical form of archaeology that exists mainly in works of science fiction. The field is concerned with the study of the material remains to reconstruct and interpret past life-ways of alien civilizations.
Freitas finds numerous reasons why interstellar probes may be a preferred method of communication among extraterrestrial civilizations wishing to make contact with Earth. A civilization aiming to learn more about the distribution of life within the galaxy might, he speculates, send probes to a large number of star systems, rather than using ...
The atmosphere of Earth is rich in nitrogen dioxide as a result of air pollution, which can be detectable. The natural abundance of carbon, which is also relatively reactive, makes it likely to be a basic component of the development of a potential extraterrestrial technological civilization, as it is on Earth.
Astrobiologists wonder if we’re not the first advanced civilization on Earth. It might seem like pure speculation, but it’s an important thought experiment.
The Sirius Mystery is a book written by Robert K. G. Temple (born Robert Kyle Grenville Temple in 1945) supporting the pseudoscientific [1] ancient astronauts hypothesis that intelligent extraterrestrial beings visited the Earth and made contact with humans in antiquity and prehistoric times. [2] [1] The book was first published by St. Martin's ...
Statue from the late Jōmon period (1000–400 BCE) in Japan, interpreted by von Däniken as depicting an alien visitor. Von Däniken suggests that the Nazca lines (200 BCE – CE 700) in Peru could be "landing strips" for alien spacecraft. The main thesis of Chariots of the Gods is that extraterrestrial beings influenced ancient technology ...