| http://www.w3.org/ns/prov#value | - Carbon isotope ratios in tooth enamel can reveal whether ancient animals ate plants that used what is called C3 photosynthesis - trees (and the leaves, nuts and fruits they produce), shrubs, cool-season grasses, herbs and forbs - or plants such as warm-season or tropical grasses and sedges that use what is known as C4 photosynthesis. (Sedges vaguely resemble grasses, but their stems' cross-section
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