Cosmic Ancestry predicts that life will be found anywhere it can get a toehold. If it exists on one planet, other planets orbiting the same star were very likely exposed to it. Therefore, Cosmic Ancestry predicts that other planets within our own solar system should show evidence of life. Now, of course, after David McKay's team from NASA published its findings (5), it looks like a pretty safe bet that Mars once had life. Intriguing photos like the one above and others, showing what NASA believes are fossilized "nanobacteria," were accompanied by analyses of chemical layers that are best explained by biological activity.
It is interesting to remember that before oxygen could accumulate in Earth's atmosphere, all the exposed iron had to rust. During that process, lasting hundreds of millions of years, Earth was also a red planet. Could the oxygen that rusted the iron on Mars have been produced biologically? Could life on Mars have simply "run out of steam" after that stage of its development?
| Darwinism and life on Mars: | Cosmic Ancestry and life on Mars: |
| Some Darwinists, like Dawkins, will be surprised if Mars has life at all. If it does, the form it takes is unconstrained by the theory. In a paper presented to The Lunar and Planetary Society in Houston Texas, 17-21 March 1997 (9) A.H. Treiman suggests, | Fred Hoyle thought the evidence for life on Mars was pretty good (10) even before NASA's 1996 announcement. Following the order of Treiman's points, Cosmic Ancestry predicts: |
| "Cells might not divide... | Cells will divide as on Earth. |
| "Biochemical pathways might be unrecognizable... | Some biochemical pathways might be unfamiliar, as some are on Earth. |
| "Biomolecules might not be homochiral... | Biomolecules will be homochiral, with righthanded nucleotides and lefthanded amino acids. |
| "Cells might not be necessary... | Cells will be necessary. This point is the foundation of Cosmic Ancestry. |
| "Genetic coding might be different... | Genetic coding might vary slightly from that on Earth, just as there are minor variations among the codings actually found on Earth. |
| "Genetic material might be different.... Very speculatively, might the genetic templates even be inorganic?" | The DNA–RNA–protein system will be conserved, and martian ribosomes will resemble earthly ones. |
Unfortunately, even if life on Mars is just like life on Earth, that won't prove to everyone the case for Cosmic Ancestry. It could be taken as evidence for a weaker form of panspermia variously called "impact panspermia," "ballistic panspermia," or "litho-panspermia," in which cells are carried to neighboring planets on the debris generated by major impacts (11). (This idea was prominently mentioned following NASA's August 7, 1996, announcement — maybe life originated there instead of here.) Ignoring panspermia altogether, martian life with the same system as ours could be used as evidence that the origin of our kind of life, from chemicals, is easy after all. The Darwinian paradigm is tenacious.