Researchers at
Brown University have found the anatomical and evolutionary basis behind the fact that some varieties of grass really are greener than others -- or at least why they're able to produce food for themselves via photosynthesis more effectively than their cousins.
According to a study in the Proceedings of the National Academy of Sciences, a slight difference in the cellular structure around the veins in blades of grass can make the difference between a grass that is highly efficient and successful and one that just putters along.
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