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Article for 12 March:Dietrich WE & Perron JT 2006. The search for a topographic signature of life. Nature 439:411-419.
Dietrich and Perron's article is based on a fascinating thesis - that the existence of life on Earth may imprint a characteristic signature on its landscapes which would not be the same as those seen in life's absence.
The ...
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Article for 7 May 2007:
Kennedy M, Droser M, Mayer LM, Pevear D, Mrofka D. 2006. Late Precambrian
oxygenation: inception of the clay mineral factory. Science 311, 1446-1449.
Quote: ''...the advent of soils sufficiently biotic for clay formation likely predated complex terrestrial ecosystems.''
Many articles emphasise the ...
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