Science, Creation & EvolutionAT MOS PHEREAs Jovaro correctly stated, we don't have the possibility to detect smaller planets. Even that is not the whole truth. First, many biological molecules are quite inert to UV radiation: Bernstein, M. P., et al. "UV irradiation of polycyclic aromatic hydrocarbons in ices: Production of alcohols, quinones, and ethers" Science 283: 1135-1138,1999 Mulkidjanian, A. Y.,et al."Survival of the fittest before the beginning of life: selection of the first oligonucleotide-like polymers by UV light." BMC Evolutionary Biology 3:12.,2003 Second, oxygen is able to filter UV radiation but there are also other mechanisms. One is described in the paper of Konhauser you cited earlier in this thread. The most simply explanation of course is, that UV radiation is also absorbed by water. And even with the planets of our own system we aren't so sure. We know that life exists on earth and don't exist on the moon. We are pretty confident, that no life can exist on planets like Pluto or Mercury. We also believe, that no life similar to the life of Earth can exist on planets like Jupiter and Saturn. But even with this leave us with Mars, Venus and Europa. On Mars we have a strange coincident of water and methane, which may be a hint for life. Europa has liquid oceans and volcanic activity. And even the composition of the hostile atmosphere of Venus shows some artifacts that might be caused life. |
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