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Luc Tardy
New research changes understanding of C4 plant evolution - http://www.sciencedaily.com/release...
...And this too. Just as we've finished looking at plants and the C4 mechanism in #BS1013, could limited carbon dioxide be only one selection pressure for C4 adaption? New evidence points to C4 plant evolution 14 million years before previous estimates and predating major reductions in atmospheric CO2. - Luc Tardy from Bookmarklet