te provoaca sa gandesti
"Comets are like cats. They have tails, and they do precisely what they want — David Levy".
Panspermia...literar tradus: "seminte peste tot". In fapt teoria care sustine aparitia vietii pe Pamant datorita calatoriei interstelare a germenilor vietii prin intermediul cometelor, prafului stelar, meteoritilor...
Cea mai veche sustinere a acestei teorii apartine lui Anaxagoras, filozof grec ce a avut influenta asupra binecunoscutului Socrate.
Apoi de-a lungul timpului o serie de ilustri savanti au adus dovezi in sprijinul panspermiei: Pasteur, Kelvin, si mai aproape de noi Fred Hoyle, Carl Sagan...
Iata in ordine cronologica ultimile argumente:
19 May 1995: two scientists at Cal Poly showed that bacteria can survive without any metabolism for at least 25 million years; probably they are immortal.
24 November 1995: The New York Times ran a story about bacteria that can survive radiation much stronger than any that Earth has ever experienced.
7 August 1996: NASA announced fossilized evidence of ancient life in meteorite ALH 84001 from Mars.
27 October 1996: geneticists showed evidence that many genes are much older than the fossil record would indicate. Subsequent studies have strengthened this finding.
29 July 1997: a NASA scientist announced evidence of fossilized microscopic life forms in a meteorite not from any planet.
Spring, 1998: a microfossil that was found in a meteorite and photographed in 1966, was recognized by a Russian microbiologist as a magnetotactic bacterium.
Fall, 1998: NASA's public position on life-from-space shifted dramatically.
4 January 1999: NASA officially recognized the possibility that life on Earth comes from space.
19 March 1999: NASA scientists announced that two more meteorites hold even stronger fossilized evidence for past life on Mars.
26 April 2000: the team operating the mass spectrometer on NASA's Stardust mission announced the detection of very large organic molecules in space. Nonbiological sources for organic molecules so large are not known.
19 October 2000, a team of biologists and a geologist announced the revival of bacteria that are 250 million years old, strengthening that case that bacterial spores can be immortal.
13 December 2000: a NASA team demonstrated that the magnetosomes in Mars meteorite ALH 84001 are biological.
June 2002: Geneticists reported evidence that the evolutionary step from chimps to humans was assisted by viruses.
2 August 2004: Very convincing photos of fossilized cyanobacteria in a meteorite were reported by a NASA scientist.
Pentru cei interesati, un link util:
cautari recente"la multi ani verisoara"
"a aplica legea"
"''Povestea furnicii''de Ion Druta"
"la placinte inaintr la razboi anapoi"
"edith piaf padam"
"camp semantic al cuvantului oras"
"e frumos si pe ploaie"
"doi de ii sau doi ii"
"mai esti intreg"
"ma ia somnul"
"a merge locutiuni verbale"
"fier de calcat"
"mi-am loat picioaele la spinare"
linkuri de la Ghidoo: