Triceratops had a stocky, powerful body similar to the modern-day rhinoceros. It is best known for having three large horns on its head. Triceratops used these horns to defend itself from predators. Learn more about this remarkable reptile in Triceratops, a Mighty Dinosaurs book.

Deinonychus was part of the dromaeosaur family of dinosaurs, which are often called raptors. It was one of the smartest dinosaurs that ever lived. Learn more about this remarkable reptile in Deinonychus, a Mighty Dinosaurs book.

Excavators are used to dig holes and lift heavy things. They use tracks to move along dirt roads. Learn more about these machines in Excavators, part of the Monster Machines series.

Dump trucks haul piles of dirt and rocks in their boxes. The biggest dump trucks can carry more than 490 tons of rocks or dirt. Learn more about these machines in Dump Trucks, part of the Monster Machines series.

Did you know that garbage trucks drive through towns and cities to pick up trash? One garbage truck can hold garbage from more than 800 houses. Find out more about these mighty machines in Garbage Trucks, part of the Mega Machines series.

Tyrannosaurus rex means "tyrant lizard king." This famous dinosaur had sharp, serrated teeth that were up to 6 inches (15 centimeters) long, or about the same size as a banana. It hunted other dinosaurs for food. Learn more about this remarkable reptile in Tyrannosaurus Rex, a Mighty Dinosaurs book.

Velociraptor was a small, feathered predatory dinosaur. It is known for the long, sickle-shaped claw it had on each foot and for being one of the smartest dinosaurs that ever lived. Learn more about this remarkable reptile in Velociraptor, a Mighty Dinosaurs book.

Stegosaurus lived in grasslands near lakes and rivers. It is best known for having the smallest brain compared to its body size of all dinosaurs. Learn more about this remarkable reptile in Stegosaurus, a Mighty Dinosaurs book.

Apatosaurus was one of the largest animals to ever live on land. This dinosaur had a neck more than 17 feet (5 meters) long. It used its long neck to eat leaves from tree branches. Learn more about this remarkable reptile in Apatosaurus, a Mighty Dinosaurs book.