Toward the end of the Age of Dinosaurs, some of the meat-eating dinosaurs became birdlike. They were covered in feathers. Learn how these dinosaurs lived and compare them to modern-day animals.

The setting -- Osteology and Ichnology -- Eggs, nests, feathers, and flight.

Many dinosaurs from around the world had plates attached to their backs. Some of their plates were as small as a dime, while others were as large as the lid of a trash can. Learn how they used their plates to survive.

Some plant-eating dinosaurs of the world had sharp horns and armored neck plates. Learn how these dinosaurs used horns and armor to defend themselves from attack or to scare away predators.

Boneheaded, duck-billed, and armoredÑwhat a display of dinosaur types! These animals lived in forests that are now the dry plains of Montana. Dig up facts about how these animals lived in prehistoric times.

Some armored dinosaurs were larger than elephants. They were covered with plates and spikes and had heavy, clubbed tails. Find out how the armored dinosaurs fought off the big, meat-eating dinosaurs.

Some plant-eating dinosaurs developed a bill similar to a duck's. But unlike ducks, the dinosaurs also had hundreds of little teeth. Find out how the duckbilled dinosaurs survived among predators.