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Spinosaurus

✨ The river giant

Spinosaurus was a large predatory dinosaur that lived during the Cretaceous Period, about 100 to 94 million years ago. Its fossils were discovered mainly in North Africa, especially in regions that are now part of Egypt, Algeria and Morocco. It was one of the longest known carnivorous dinosaurs, with estimates suggesting it may have reached more than 14 meters in length.

Spinosaurus had a long, narrow skull similar to that of a crocodile, with conical teeth suited for catching fish. One of its most recognizable features was the tall sail-like structure on its back, formed by elongated spines extending from its vertebrae. Scientists think this structure may have been used for display, temperature regulation, or other functions that are still debated.

Unlike many other large meat-eating dinosaurs, Spinosaurus was strongly associated with aquatic environments. Its body had adaptations that suggest it spent a significant amount of time near water, including dense bones that may have helped with buoyancy control and a long tail useful for swimming.

It probably fed mainly on fish, although it may also have eaten other animals when opportunities arose. The exact way Spinosaurus moved and hunted is still being studied because its fossils are incomplete. Like all non-avian dinosaurs, it disappeared during the mass extinction event at the end of the Cretaceous Period, about 66 million years ago.

💡 Did you know?

The sail on the Spinosaurus's back could be up to 2 meters (6.5 feet) high—the size of a doorway! It was made of long bony spikes covered in skin. Scientists think it might have worked like a solar panel to warm it up or like a periscope so others could see it from afar while it swam just below the river's surface.

Unlike most dinosaurs that had light bones for walking on land, Spinosaurus had very dense and heavy bones. Why? That was its secret for being able to dive and stay underwater without floating like a cork! It's exactly the same technique that hippos use today to walk along the bottom of the water.

Spinosaurus's snout was riddled with tiny holes that were actually ultra-sensitive pressure sensors. They allowed it to detect fish movement even in very muddy water without needing to see them! It was as if it had a built-in radar at the tip of its nose for hunting with surgical precision.