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 are using used fossilized feces and vomit from Poland to reconstruct how dinosaurs came to dominate the Earth.

Studying bromalites helped paleontologists piece together how the reptiles came to rule a part of the prehistoric world.