With its small head and long snout, this herbivorous dinosaur measured an impressive size: from 7 to 9 m long and up to 4 m high for a weight which could reach up to 3 tonnes. This curious quadruped lived in the late Jurassic period (approximately 150 million years ago) and is fascinating for the large plates which stood upright on its back. They could reach up to 2 m in height and it can only be supposed that they played among other things the role of a heat regulator. To defend itself, the stegosaurus’ long tail was equipped with spikes at the far end measuring up to 1 m in length. An amazing weapon for this rather slow creature!