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Dinosaur footprints, usually made in mud or fine sand, have been found at over 1500 sites, including quarries, coal mines, riverbeds, deserts, and mountains. There are so many of these fossils because each dinosaur made many tracks (but had only one skeleton) and because tracks fossilize well.
Unfortunately, linking a set of tracks with a particular species is often virtually impossible.
Fossil footprints have yielded information about:
Speed and length of stride
Whether they walked on two or four legs
The bone structure of the foot
Stalking behavior (a carnivore hunting a herd of herbivores)
The existence of dinosaur herds and stampedes
How the tail is carried (few tail tracks have been found, so tails were probably held above the ground).
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