Professor Steven Benner will tell geochemists gathering today (Thursday, 29 August) at the annual Goldschmidt conference that an oxidized mineral form of the element molybdenum, which may have been crucial to the origin of life, could only have been available on the surface of Mars and not on Earth.
A new study has shown how low temperature chemical reactions between iron-containing minerals and water could produce hydrogen 'food' for microorganisms that inhabit pores and cracks in rocks below the ocean floor and parts of the continents.
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