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.

Using fossilized feces and vomit samples from Poland, scientists have reconstructed how dinosaurs came to dominate the Earth millions of years ago. Researchers aren't sure whether dinosaurs' rise over the course of 30 million years happened because of luck,

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