Brachiosaurus altithorax

Hello there! My name is Brachiosaurus altithorax, and I want to tell you my story. My name is a combination of two words that mean 'arm lizard' and 'deep chest,' and you'll soon understand why. My adventure began around 154 million years ago during the Late Jurassic Period. I lived in the Morrison Formation in North America and, like other sauropods, is believed to have hatched from eggs, though direct evidence is lacking. My world was a lush landscape of towering ferns, cycads, and conifers. From the moment I hatched, I was already quite large, but I still had a long journey of growth ahead of me before I could take my place among the herds of giants that roamed the land.

As I grew, my most distinctive features became my incredibly long neck and my front legs, which were significantly longer than my back legs. This combination gave me a unique, sloping back, making me look like a walking hill. This body shape wasn't just for appearance; it was a crucial tool for my survival. By around the year 153 million BCE, I had grown large enough to use my long neck to my full advantage. I could browse at heights up to approximately 9 meters (30 feet) due to my long neck, a feast that was unavailable to most other dinosaurs. I was an herbivore, so my diet consisted entirely of plants. While I was a peaceful creature, I always had to be cautious of predators like the fearsome Allosaurus. Fortunately, my enormous size was my greatest defense, making me a difficult target for any hunter.

My time on Earth came to an end, as all things do, but my story was far from over. Millions of years passed, and the world changed completely. Then, on July 4th, 1900, a human paleontologist named Elmer S. Riggs was exploring the Grand River Canyon in Colorado when he discovered my fossilized bones. It was a remarkable find, though it took him some time to understand its significance. In 1903, after careful study, he gave me my official name: Brachiosaurus altithorax. He chose 'arm lizard' because he was so impressed by my long front limbs, which he correctly identified as my most unique characteristic.

For many years after my discovery in 1900, scientists had some interesting but incorrect ideas about how I lived. Because my nostrils were located high up on my skull, they imagined I spent my life in the water, like a giant submarine, using my head as a snorkel to breathe while my body was submerged. They pictured me wading through deep swamps, using the water to support my massive weight. However, in the 1970s, scientists like Robert Bakker re-examined sauropod dinosaurs, including Brachiosaurus, proposing they were more active and terrestrial. They realized my bones were structured to support my immense weight on solid ground, and my deep chest would have been crushed by the water pressure in deep water. It became clear that I was a fully terrestrial animal, an active giant that strode proudly across the prehistoric plains.

I lived during the Late Jurassic Period, a time of giants and incredible life. Though I no longer walk the Earth, my story continues to inspire awe and wonder in your time. The very skeleton that Elmer S. Riggs discovered in 1900 was carefully assembled, and beginning in 1993, it stood for many years as the first mounted Brachiosaurus skeleton at the Field Museum in Chicago, amazing countless visitors. My fossils help you understand not only the immense size dinosaurs could achieve but also the diversity and complexity of life millions of years ago. I am a reminder of a magnificent lost world and the incredible, enduring power of nature.