Gigantism and acromegaly are two disorders with the same disease mechanism and somewhat similar presentations. Even though they have the same disease mechanism, the two have entirely different outcome simply due to the age of onset. Gigantism is the result if the disease mechanism starts in childhood.
Adult Velociraptors grew up to 6.8 feet (2 meters) long, 1.6 feet (0.5 meter) tall at the hip and weighed up to 33 pounds (15 kilograms).
Apatosaurus (which used to be known as Brontosaurus) was one of the largest land animals that ever existed. Apatosaurus lived during the late Jurassic Period, about 157-146 million years ago. Anatomy: Apatosaurus was a long-necked, whip-tailed dinosaur.It measured about 70-90 feet long (21-27 m) and about 15 feet (4.6 m) tall at the hips. Its head was less than 2 feet long; it had a long skull and a very tiny brain.natomy: Apatosaurus was a long-necked, whip-tailed dinosaur. It measured about 70-90 feet long (21-27 m) and about 15 feet (4.6 m) tall at the hips. Its head was less than 2 feet long; it had a long skull and a very tiny brain.