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).
Dreadnoughtus Credit Jennifer Hall. 1  PHILADELPHIA â Eighty-five feet long, 30 feet tall, 130,000 pounds and still growing when it died, a newly described dinosaur is among the largest land animals that ever lived â so big its discoverers are calling it the Dreadnoughtus.