When and where did grasses evolve? In what environments are grasses first found? Scarce plant fossils point to the Late Cretaceous of the southern continents, but almost nothing is known about these, the earliest relatives of wheat, corn, and rice. In January, Caroline traveled to southern South America to add a piece to this puzzle. Specifically, she and her Argentine colleagues toured Cretaceous and Paleocene sites in Patagonia, Argentina, to sample small rock samples. In these samples, the Strömberg Lab will look for signs of early grasses in the form of microscopic plant silica (phytoliths).
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