Brachiosaurus

Brachiosaurus was a towering sauropod dinosaur that roamed North America around 155 to 145 million years ago. With its long neck and front legs taller than its back legs, it stood out even among other giant plant-eaters of the Jurassic period.

• Its front legs were longer than its back legs, giving it a high shoulders and sloping back.
• An adult Brachiosaurus could weigh as much as 46 metric tons.
• Its name means 'arm lizard,' referring to those unusually long front limbs.