Okay, that's an interesting question, but $2.5 billion? Well, yes, when you understand that what's at issue here is not just a matter of scientific exploration but most importantly the need to buttress a major metaphysical or religious worldview.
David Klinghoffer explains:
Make no mistake, NASA has committed $2.5 billion to this little project in large part to satisfy a need in the culture of Big Science -- a culture that extends far beyond the professional ranks of actual scientists -- for validation of a particular worldview. In that worldview, life arises and evolves spontaneously -- it must do so -- reflecting no purpose or design, given a handful of (not especially elevated) ingredients and enough time.It's interesting that NASA is spending billions of taxpayer dollars to essentially seek confirmation of what is basically a religious doctrine, i.e. materialism. I wonder how much the government would be willing to spend to investigate the claim that there's a massive wooden barge frozen on Mt. Ararat. That would also confirm a major metaphysical belief, and there's at least some tenuous evidence that such an artifact is actually there, but I doubt that there'd be funds available to investigate that. Taxpayer money can only be used to support attempts to discredit traditional religion, not to reinforce it.
In this Darwinian picture, life is nothing special. Countless men and women stake the meaning of their own lives, or rather the meaning they imagine and invest in their lives, on this idea. Yet two empirical problems intrude. First, the more science learns about the inner space of the cell with its "machinery" (for want of a better word), the more profoundly special life appears to be. Second, the Darwinian view requires, since life is so prosaic, that it should have arisen all around the cosmos, in intelligent and other forms, and probably in our own solar system too other than on Earth alone. Yet persistent efforts by SETI to detect evidence of extraterrestrial intelligence have conspicuously failed.
Turning from these discouraging data, NASA offers hope in the form of Curiosity and its mission. To shore up a beleaguered philosophical perspective, Darwinian materialists would be delighted -- no, tremendously relieved -- by the discovery of past or present Martian microbes. Failing that, they would receive news that life's "ingredients" have been found on Mars with reverent gratitude.
Anyway, Klinghoffer goes on to discuss why the discovery of evidence of Martian life would have no effect whatsoever on intelligent design theory and would really settle nothing in the debate between IDers and materialists. Give it a look.
