The first dinosaur ancestors were opportunistic. They were eating insects, fish, plants—everything that they came across. Ultimately, that dietary flexibility allowed them to rule the Earth.
We know a lot about the life and extinction of the dinosaurs, but not so much the rise of the dinosaurs. At the beginning of the Triassic period, dinosaurs were one of many lizards roaming the Earth.
As it turned out, all of our samples contained undigested food residues. A fish scale here, an insect there—each dropping was a tiny window into what was on the menu.
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