Re: PNAS paper on ALH84001
So... the paper argues against the biological origin of martian nanocrystals found in the meteorite named ALH84001. Seems like there are a lot of OTHER things that would preclude life on mars, like an atmosphere so thin as to resemble a vacuum, low gravity prevents fertile plant growth, cryogenic temperatures, solid carbon dioxide frost, extremely alkaline hydrogen peroxide in the soil, ground-level ultraviolet sunlight, no water, no water, no water !