Many other histories, more or less complete, have, however, now been compiled from the fossil record. These involve an extremely wide variety, samples from all parts of the plant and animal kingdom-ferns, grasses, oaks, microscopic one-celled animals, clams, snails, fishes, dinosaurs, camels, elephants, and many others. Paleontological demonstration of the truth of evolution can now be based on any of a hundred or more different families as on the horse family.
Simpson, G. G. 1951. Horses. Oxford University Press.
Simpson, G. G. 1951. Horses. Oxford University Press.
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