Anyone who has ever flipped open a dinosaur book is likely familiar with pachycephalosaurs. These dome-headed dinos are often depicted ramming the tops of their bowling-ball-like skulls into predators ...

The Cairo Fossil Forest is the second oldest in the world. These forests mark a turning point in Earth's history because they ...

Scientists have unearthed in Mongolia the oldest and most complete fossil of a pachycephalosaur, a group of dinosaurs known for their dome-shaped skulls, according to a new study published Wednesday ...

Why it's incredible: The forest preserves some of the oldest trees in the world. The Cairo Fossil Forest is a unique collection of 385 million-year-old trees preserved in an abandoned quarry in ...