The way the dinosaurs relinquished their long dominance is well known. An asteroid struck Earth 66 million years ago, triggering a horrific mass extinction. But the way the dinosaurs - modest creatures initially - came to supremacy is less well understood.

Scientists studied trace fossils called bromalites to reconstruct critical food webs in late Triassic, early Jurassic.

Fossilized droppings from the Triassic and Jurassic are revealing the diets of some dinosaurs—including a surprising taste for charcoal.