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Past Life is Probably in Comet 67P.
Monday, December 15, 2014 2:29
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News media reported that several species of organic molecules had been detected at the spot where Philae landed on Comet 67P (note 1). Most of organic molecules result from life (notes 2, 3). On Earth, non-biological organic molecules do not exist alone without mixing with biological organic molecules (note 4). For example, non-biological methane is frequently mixed with biological methane (note 5). As past life has been found all over the cosmos (note 6), past life is probably in the “several species” of organic molecules found on Comet 67P.
Note 1: Stephan Ulamec, the head of the Rosetta lander team, said: “We want to be sure. But it’s definitely several species.” Quoted from the fifth paragraph in http://www.popsci.com/philae-finds-organic-molecules-comet
Note 2: For example, most of naturally occurring methane originated from life, according to this Wikipedia article.
Note 3: Organic molecules of comet 67P are not pre-biotic, as the comet originated from Mars (see http://wretchfossil.blogspot.tw/2014/11/comet-67p-broke-off-from-mars.html )
Note 4: In the environment of Comet 67P, there is no mechanism for nonliving matter to form several species of abiotic organic molecules at a spot without any biotic organic molecule (see also note 5 below).
Note 5: “In most geologic environments biotic and abiotic gases are mixed, and …not easy to distinguish them.” Quoted from the introduction in this article.
Note 5: “In most geologic environments biotic and abiotic gases are mixed, and …not easy to distinguish them.” Quoted from the introduction in this article.
Note 6: Evidenced in http://wretchfossil.blogspot.tw/2011/05/censored-past-life-is-all-over-cosmos.html
Read more at http://wretchfossil.blogspot.tw
