A recent movie battle pitted a Spinosaurus against Tyrannosaurus rex, with the former portrayed as a victor after it snapped its rival’s neck. While Spinosaurus and T. rex never fought in real life, since they lived millions of miles and thousands of years apart, Spinosaurus holds the world record for being the largest known carnivorous dinosaur, given its impressive length and 9.9-ton build.
The imposing dinosaur’s most unusual feature was its large sail. Whenever Spinosaurus would arch its back, the sail, made of lengthy spines covered with skin, would rise into the air. The sail alone was the height of a human basketball star. Paleontologists continue to debate its function, but most suspect the sail helped to regulate body temperature and was used to woo the opposite sex or to scare off competing males.
Teeth and Diet
It’s no wonder Spinosaurus often makes film appearances, since this dinosaur flashed a million-dollar "smile." While most carnivorous dinos had curved teeth, the teeth of Spinosaurus were straight and probably functioned like knives, skewering often-slippery prey. Like modern grizzly bears, Spinosaurus probably spent a lot of time grabbing fish in, or near, water. A dinosaur of such girth, however, likely did not subsist on an all seafood diet. It probably killed and consumed smaller dinosaurs too, along with scavenging flesh from corpses.
Big Head
Such feasting would not have posed a challenge, since Spinosaurus possessed what was arguably the longest head of any known carnivorous dinosaur. Measuring close to 6 feet in length, the head featured a narrow snout — all the better for showcasing its straight teeth — with tiny ears on either side. Scaly skin covered its neck.
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