The animals, which had a short neck, small head and low brain-to-body mass ratio, which is a rough estimate of the intelligence of an animal, and used their spiked tails as a defense against predators, were the stegosauruses.
The animals, which had a short neck, small head and low brain-to-body mass ratio, which is a rough estimate of the intelligence of an animal, and used their spiked tails as a defense against predators, were the stegosauruses.