On 25 Feb 2004, Thomas Lee Elifritz wrote:
|If you choose the water and ice hypothesis then you have to start
|thinking about life, and fossils.

It looks like the violence that is characteristic of Mars' past history
rules out anything beyond 'precursors' to life being generated, over and
over again - and as quickly rubbed out as created.

|If you choose the fossil hypothesis, you have to start thinking about
|natural selection and biology, in addition to planetary geology.

Now, if only the rovers could dig into the surface a little deeper, we
might have some reason to entertain a hypothesis or two about fossils...