Imagine walking through a forest 150 million years ago and seeing a head peeking over the tops of the tallest trees. This was the daily life of the Brachiosaurus, a massive dinosaur that lived during the Late Jurassic period. Known for its incredible height and gentle nature, the Brachiosaurus remains one of the most fascinating creatures to ever walk the Earth.
The name Brachiosaurus means "arm lizard." Scientists gave it this name because of its unusual body shape. Unlike most dinosaurs, its front legs were significantly longer than its back legs. This gave the Brachiosaurus a sloping back and a posture very similar to a modern-day giraffe. Because of its long front limbs and an even longer neck, this dinosaur could reach branches that were 30 to 40 feet off the ground, accessing food that other herbivores could not reach.
Being a herbivore, or plant-eater, the Brachiosaurus needed a lot of fuel to power its colossal body. It is estimated that an adult could weigh as much as 60 tons—about the same as twelve African elephants! To maintain its weight, it spent most of its day munching on the needles of conifer trees, gingkos, and ferns. Its teeth were shaped like spoons or pegs, which were perfect for stripping leaves off branches but not for chewing. Instead, the dinosaur swallowed its food whole and let its massive stomach do the hard work of digestion.
For a long time, people thought the Brachiosaurus lived in the water to help support its heavy weight. However, paleontologists now know it was a land-dweller. Its bones were actually filled with air sacs, which made its skeleton lighter and stronger, allowing it to walk on solid ground. Discoveries in North America have helped us understand how these giants moved across the ancient plains. Even though they have been extinct for millions of years, the Brachiosaurus continues to tower over our imaginations today.
