Ancient South Americans were apparently inspired by fossilized dinosaur tracks in what is now eastern Brazil, where they cut figures into the rock, imprinted tens of millions of years earlier by the movements of giants.
We know them in death. We know how they died, some of what they ate, how they grew, where they may have roamed, and even if they suffered from disease or injury. Preserved bones can tell us a lot, but perhaps just as interesting are the stories they left in traces, where their behavior, even for one moment, is…