Also found in: Medical, Encyclopedia, Wikipedia.


The theory that microorganisms or biochemical compounds from outer space are responsible for originating life on Earth and possibly in other parts of the universe where suitable environmental conditions exist.

[Greek panspermiā, mixture of all seeds : pan-, pan- + sperma, seed; see sperm1.]


(pænˈspɜːmɪə) ,






(Philosophy) a 19th-century evolutionary theory that precursors to life exist in space and will develop on finding suitable conditions
References in periodicals archive ?
As "Our Cosmic Ancestry in the Stars: The Panspermia Revolution and the Origins of Humanity" shows with conclusive scientific evidence, life came from space--a concept known as "panspermia".
The panspermia theory suggests that organisms existed on Mars early in its history, and were thrown from the planet by an asteroid impact in or on ejected rocks and transported into the inner Solar System.
This doesn't necessarily mean that this was done deliberately by some advanced alien race (a theory known as directed panspermia), but that the building blocks of life hitching rides on comets and meteors crashed into a young earth and kick-started evolution during the Late Heavy Bombardment about four billion years ago.
Alternatively, microbial life from outside the solar system, such as bacteria contained in extra-solar comet(s) or asteroids (e.g., the extra-solar asteroid Oumaumau recently detected in the solar system (5)), could have deposited evolutionarily-related microbes to various planets or moons, in a process referred to as panspermia.
At the beginning of the 20th century Svante Arrhenius formulated the hypothesis of panspermia [1, 2], in which he suggested an extraterrestrial source of life.
He details how an advanced race implanted the basic genome on Earth as well as genetically engineered the human race and shows how our spectrum of blood types supports the theory of panspermia while directly contradicting the conventional "out of Africa" theory of evolution.
Obviously this doesn't make hard conclusions about the idea of panspermia, but it does require us to examine our assumptions about how life on our planet might have begun.
De la panspermia: segun Alexei Sharov y Richard Gordon, en su trabajo denominado Life Before Earth, la vida no surgio en la tierra, sino que vino a la tierra desde el espacio exterior a traves de particulas resistentes a la radiacion, al vacio y a las altas temperaturas [14].
Se han realizado experimentos en el espacio con microorganismos (Horneck et al., 1993), con especies de liquenes extremofilos (Sancho et al., 2007) y con comunidades microbianas endoliticas (incluyendo liquenes), (De la Torre et al., 2010) que viven sobre y dentro de rocas, para estudiar la resistencia de estas especies en el espacio y en condiciones de Marte, ademas de comprobar su capacidad de resistir un hipotetico viaje interplanetario, segun postula la hipotesis de Litopanspermia (Panspermia, Arrhenius, 1903, Premio Nobel).
Short of assuming that somehow the proteins came from outside the universe (a hypothesis named panspermia, entertained by distinguished scientists such as Kelvin, Arrhenius, Hoyle, among others), we'd better look for models that can explain not only their presence, but also those aspects of the living that no physics can justify-at times at the price of ignoring them.
He was a long-time collaborator with famous astronomer Fred Hoyle on panspermia (the theory that life is widely distributed in space, seeded by the presence of spaceborne amino acids) and a founder of astrobiology, the study of life in space.
Pero caben pocas dudas acerca de que entre los objetivos mas populares de la mision Rosetta se encontraba el de identificar posibles moleculas organicas que abriesen una puerta a la hipotesis de la panspermia, la teoria enunciada por Svante Arrhenius que situa el origen de la vida en nuestro planeta a partir de la llegada de materiales organicos depositados por uno o varios meteoritos.