In Bolivia, the largest number of dinosaur footprints ever recorded in a single spot is yielding fascinating insight on how these prehistoric animals moved in a way that bones just can’t.

16,600 footprints, forming dozens of “trackways,” have been so far documented on what would have been the muddy floor of a waterway along what is now the coastline in Bolivia’s Carreras Pampas.

If a skeleton shows what a dinosaur could do, tracks show what they actually did; and while bones may be transported from the location of death through environmental events, a footprint provides perfect evidence of where exactly a dinosaur was at a given time.

These and other aspects of the tracks are why this site in the Torotoro National Park in Bolivia has paleontologists so excited.

The tracks were made by

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