Panspermia


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panspermia

[pan′spər·mē·ə]
(biology)
The theoretical ability of life to travel from body to body within the solar system.

Panspermia

 

a hypothesis that living beings were brought to the earth from space. The theory was advanced by the German scientist H. Richterin 1865 and supported by H. Helmholtzand S. Arrhenius.

According to panspermia, living embryos were brought to the earth by meteorites or by means of light pressure. Maintenance of their life in interplanetary space was considered possible because at low temperatures primitive organisms in a state of anabiosis can remain alive. But since it was later proved that they would have been destroyed by ultraviolet and cosmic rays, the transfer of living embryos through space must be regarded as unlikely. The panspermia hypothesis is also methodologically untenable since it does not answer the question of the origin of life.

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This research suggests that panspermia, while certainly not proven, is not impossible either.
En el cosmos, hipotesis de la panspermia (Svante Arrenius, Fred Hoyle y Francis Crick); en granos de polvo interestelar; en particulas de hielo sucio de un cometa; en el oceano; en una laguna; en un charco; en una fisura de roca; entre capas de arcilla; cerca de fuentes termales; en una dorsal oceanica; bajo el hielo de los polos.
Orgel, "Directed Panspermia," Icarus 19 (1973): 341-6.
Dawkins' principal strategy, consuming roughly half of his essay, is to focus on "directed panspermia," (aka "exogenesis"), the irrelevant notion that life on Earth was "seeded" by life forms residing elsewhere in the universe.
Or they may have gotten a ride to Venus on debris splashed into space during impacts on Earth, an interplanetary "seeding" termed panspermia (S&T January 2007, page 34).
That life appeared on earth so quickly after it provided an environment hospitable to life is quite astounding, and has given rise to the hypothesis of panspermia, the arrival of life from some other part of the universe.
The team led by Professor Chandra Wickramasinghe has been pioneering research into panspermia - the theory life began inside comets and then spread to habitable planets across the galaxy - for more than 25 years.
Professor Chandra Wickramasinghe and colleagues at the University's Centre for Astrobiology have long argued the case for panspermia - the theory that life began inside comets and then spread to habitable planets.
An easy justification for this creative banality is the doctrine of panspermia, according to which all sophonts in the universe originate from the same seeds.
The extraterrestrial or panspermia theories suggest that life existed in outer space and was transported by meteorites, asteroids, or comets to a receptive Earth.
Richter, who in the late nineteenth century scientifically advocated the theory of panspermia, that life was seeded from outside the earth, specifically from meteorites that had picked up living cells.