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Extraterrestrial life forms might, for example, choose to allow contact once the human species has passed certain technological, political, and/or ethical standards. Alternatively, they may withhold contact until humans force contact upon them, possibly by sending a spacecraft to an extraterrestrial-inhabited planet. In this regard, reluctance ...
The Berserker hypothesis, also known as the deadly probes scenario, proposes self-reproducing machines that would seek to destroy organic life. [3]: 112 The name derives from short stories by Fred Saberhagen written in the 1960s. The dark forest hypothesis is distinct from the Berserker hypothesis in that under the former, many alien ...
It discusses the possible nature of life on other planets, based on the study of animal life on Earth. The book argues that the evolutionary processes that are observed operating on Earth are universal, and a necessary requirement for the presence of complex life on any planet. As a result, many aspects of animal behavior are likely to be ...
The notion of time travel from the future to the past is thought to have been introduced for the first time in literature by French botanist and geologist Pierre Boitard in his popular 1861 book Paris avant les hommes (Paris before Men), featuring a man sent back to prehistoric Earth where he interacts with an ape-like ancestor, [7] A few years later, in 1887, Camille Flammarion published ...
The implications of extraterrestrial contact depend on the method of discovery, the nature of the extraterrestrial beings, and their location relative to the Earth. [19] Considering these factors, the Rio scale has been devised in order to provide a more quantitative picture of the results of extraterrestrial contact. [19]
The book describes the 2017 detection of ʻOumuamua, the first known interstellar object to pass through the Solar System. [8] [9] Loeb, an astronomer at Harvard University, speculates that the object might be an extraterrestrial artifact, [10] a suggestion considered unlikely by the scientific community collectively.
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.
The Berserker hypothesis is distinct from the dark forest hypothesis in that under the latter, many alien civilizations could still exist provided they keep silent. The dark forest hypothesis can be viewed as a special case of the Berserker hypothesis, if the 'deadly Berserker probes' are (e.g. due to resource scarcity) only sent to star ...