The Ultrasaurus lived 1,000,000 years ago. The Ultrasaurus had a long tail and a big body and it also had four legs. It had a long neck and the head had a big lump on top. It also had sharp teeth to eat plants. The Ultrasaurus looked like the Brontosaurus.

The Ultrasaurus lived in the Jurassic Period. The Ultrasaurus bit on the plants and swallows it when it bites it. It doesn't chew on it. The Ultrasaurus eats the leaves on trees because it had a long neck.

The Ultrasaurus lays eggs and it just left them on the ground. They had to watch out for enemies like the Allosaurus because they would eat the Ultrasaurus.