"Panspermia Past and Present"- OoL looking good for ID
Dissemination of Life in Space:
It has been known for a long while that random chemical interactions cannot produce the genetic information of the organisms we currently see on Earth (Argyle 1977, Hoyle 1980, Hart 1982, Barrow and Tipler 1986, Wesson 1990). For example, in a model of the prebiotic Earth with an appropriate complement of amino acids, random molecular interactions over a period of 500 x 106 yr would produce only about 194 bits of information (Argyle 1977). This is far short of the 1.2 x 105 bits in a typical virus, and tiny compared to the 6 x 106 bits in a bacterium like E. Coli. The low gain in information I from N trials is because the two things are related by I = log2 N . There are in principle two ways to circumvent this problem. One is that life in fact evolved solely on the Earth, but by some non-random, directed molecular process. The other is that life evolved on the Earth and other planets because they were seeded by biological molecules which already had a large information content. Both of these hypotheses have objections; but in view of the near-inevitability of this process shown above, the second appears to be the more plausible.