The Story of Allosaurus

Hello, my name is Allosaurus. That name means 'different lizard,' and I think it suited me well. I lived a very long time ago, during a time scientists call the Late Jurassic Period, about 150 million years ago. My world was very different from yours. It was a warm, green place filled with giant ferns that uncurled towards the sun and trees that were taller than anything you can imagine. The air was humid and everything was lush and alive. This was the perfect home for a large hunting dinosaur like me, with plenty of places to hide and plenty of other dinosaurs to watch. It was a wild and wonderful world, and I was one of its most powerful creatures.

I began my life by hatching from a tough, leathery egg. Even when I was young, I was built to be a hunter. My most noticeable feature was my head, which was very large compared to my body. Right above my eyes, I had two small, bony horns that made me look fierce. My back legs were incredibly strong and powerful, designed for running at high speeds to chase down other animals. But my most important tools were in my mouth. It was filled with dozens of sharp, serrated teeth, like little steak knives. If I ever lost a tooth while hunting or eating, it wasn't a problem. A new one would grow right back in its place. This meant I was always ready for my next meal, with a full set of sharp teeth to help me survive.

As I grew, I became an apex predator, which means I was at the very top of the food chain. My world was full of amazing dinosaurs. I shared the forests and plains with giant, long-necked plant-eaters like Diplodocus and the famous Stegosaurus, with its big plates and spiky tail. Hunting these large animals was my main job. I used my powerful jaws to deliver a strong bite, and my sharp teeth did the rest. When I was running, my long, heavy tail stretched out behind me. It wasn't just for show; it helped me keep my balance, especially when I had to make a quick turn while chasing my next meal. Life wasn't always easy. Being a top predator meant facing danger. Sometimes I got into fights or was injured while hunting. I collected bumps and bruises over the years, but I was built to be a survivor. My body was strong and could heal from many injuries, allowing me to continue my rule as one of the Jurassic period's greatest hunters.

I lived during the Late Jurassic Period. My time on Earth ended long before humans arrived, but my story wasn't over. Millions of years later, in 1877, people discovered my fossilized bones for the first time. It was a scientist named Othniel Charles Marsh who studied my remains and gave my kind the name Allosaurus. Since then, many more of my bones have been found. One very special fossil, found in 1991 and nicknamed 'Big Al,' was almost complete. Big Al’s bones told scientists so much about my life, showing them injuries I survived and clues about the food I ate. My bones are like a history book, helping everyone today understand the incredible world of dinosaurs and my role as a mighty hunter.

Lived during c. 1 BCE - 145.0 Million Years Ago (circa)
First Described 1877
Famous Fossil Discovery ('Big Al') 1991