Scientists have discovered the single largest dinosaur track site in the world in Carreras Pampa, Torotoro National Park, Bolivia. The tracks were made around 70 million years ago, in the late Cretaceous Period, by theropods – bipedal three-toed dinosaurs – with bird tracks also present in this ancient beach scene.

Over 16,600 footprints and swim traces cover the ancient trackway surface, all heading in the same direction. Swim traces form when floating or swimming animals briefly touch the bottom, often with just their toes making contact. The researchers suggest the traces were made parallel to an ancient shoreline, which preserves beautiful ripple marks.

Modern studies of animals at African water holes and lake margins suggest that herbivores tend to move perpendicular to a shore, moving quickly across the open areas close to a lake. In contrast, carnivores tend to travel parallel to the shore, since this gives them the best chance of intersecting prey.

There are no hard and fast rules here,........

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