Long before humans walked the Earth, dinosaurs roamed the planet. These fascinating creatures were part of the reptile family and lived during the Mesozoic Era, which lasted from about 252 to 66 million years ago. Dinosaurs came in all shapes and sizes, from small, bird-like creatures to massive, plant-eating giants like the Brachiosaurus, which could grow up to 85 feet tall. Some dinosaurs, like the Velociraptor, were predators and had sharp teeth and claws, while others, like the Stegosauru...