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Panspermia as it is known today, however, is not identical to this original theory. The name, as applied to this theory, was only first coined in 1908 by Svante Arrhenius , a Swedish scientist. [ 14 ] [ 19 ] Prior to this, since around the 1860s, many prominent scientists were becoming interested in the theory, for example Sir Fred Hoyle , and ...
The theory held that "lower" animals are generated by decaying organic substances. Aristotle stated that, for example, aphids arise from dew on plants, flies from putrid matter, mice from dirty hay, and crocodiles from rotting sunken logs. [16] The basic idea was that life was continuously created as a result of chance events. [17]
Pseudo-panspermia (sometimes called soft panspermia, molecular panspermia or quasi-panspermia) is a well-supported hypothesis for a stage in the origin of life. The theory first asserts that many of the small organic molecules used for life originated in space (for example, being incorporated in the solar nebula , from which the planets condensed).
Dating back to Anaxagoras in the 5th century BC, panspermia [29] is the idea that life originated elsewhere in the universe and came to Earth. The modern version of panspermia holds that life may have been distributed to Earth by meteoroids, asteroids, comets [30] or planetoids. [31]
Directed panspermia is a type of panspermia that implies the deliberate transport of microorganisms into space to be used as introduced species on other astronomical objects. Historically, Shklovskii and Sagan (1966) and Crick and Orgel (1973) hypothesized that life on the Earth may have been seeded deliberately by other civilizations.
Gurzadyan showed that the complexity of the human genome is relatively low due to non-random parts in the genomic sequences. Moreover, he noticed that since the genomic information on the terrestrial life, starting from bacteria up to humans, contains essential common parts, the entire terrestrial life information can be compressed and ...
Impact survival is a theory that life, usually in the form of microbial bacteria, can survive under the extreme conditions of a major impact event, such as a meteorite striking the surface of a planet. [1] This step is necessary for the possibility of panspermia.
Thomas Gold [3] (May 22, 1920 – June 22, 2004 [4]) was an Austrian-born astrophysicist, who also held British and American citizenship.He was a professor of astronomy at Cornell University, a member of the U.S. National Academy of Sciences, and a Fellow of the Royal Society (London). [4]