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Trace fossils are fossilized tracks and other evidence of the activity of organisms. For example, a set of tracks, you might be able to learn something about the social life of sauropods, which were large, plant-eating dinosaurs. The largest tracks of the herd are on the outer and the smallest are on the inside. This tracks led some scientists to hypothesize that adult sauropods surrounded their young as they traveled- perhaps to protect them from predators. A nearby set of tracks might mean that another type of dinosaur, an allosaur, was stalking the herd.

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14y ago

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