T-Rex Would Win

In [url=http://www.jurassicpark4-movie.com/community/forums/topic/25057]my last post[/url] , I explained why Spinosaurus would win in a confrontation with T-Rex. In this one, I will explain why Tyrannosaurus Rex would win. First of all, T-Rex had millions of years of evolution over Spino. As humans, it is difficult to comprehend just how long that is. Dinosaurs ruled the earth for a good 100 million years or more, and T-Rex had at least 25 million years on Spinosaurus. For an image of just how long that is, the first humans branched from chimpanzees 5 million years ago, in the form of Australopithecus, but full humans have been around for less than a million years. We turned from chimps to cavemen just a few million years ago. Amazing, right? Can you imagine what another 20 million years will do to humans? We might even have dinosaurs revived by then! Anyways, as a result of the millions of years, it certainly had some improvements, but perhaps the most crucial was intelligence. With a brain twice the size of a Spinosaurus, you have to imagine it would have an edge. Much of the brain went towards keen senses. The T-Rex had a keen sense of smell and a great depth perception due to forward facing eyes. While this wasn't greatly important to battle, it was important in hunting and scavenging. Another feature that came with evolution was the huge bite force. While some say that a 60 foot Spinosaurus would have a 6 ton bite force, others say it would only have a 3 ton bite force. In comparison, a 43 foot T-Rex would have a bite force estimated at up to 7 tons. In the powerful jaws, there were serrated the size and shape of bananas, capable of subduing even the largest herbivores. With some estimates putting an adult T-Rex at 46-50 feet, the bite force would be even greater. Another perk was overall power. Even Rex's tiny arms were stronger than those of most Olympic weight lifters. Heavily muscled legs would have been able to push the tyrant lizard king to speeds at up to 25 miles per hour for short distances. You could argue that this would be useless, since Rex wouldn't be chasing Spino, but it could come in handy for a running headbutt that could easily topple the giant. Part of what would make the headbutt so effective is the Tyrannosaurus' thick skull. Despite being hollow, T-Rex had a surprisingly dense skeleton. This suggested that it was built for combat, perhaps fighting with the extremely dangerous Triceratops, or possibly for surviving whips from the tail of a sauropod that's not too keen on being a meal. Also, distorted ribs of the Tyrannosaurus Rex have been found. They not only suggest that the dinosaur survived broken bones, but was capable of healing them. My final reason isn't so much a pro for Rex, but a con for Spino: it was frail. For a 54+ foot dinosaur, Spinosaurus had a lot of problems. Since it relied on size to intimidate most of the time, it would have had less of a need to be strong for combat. With thin (thinner than Rex, anyway) bones, a blood filled sail that could have caused a death by blood loss if bitten, long easily broken neural spines and week jaws, Spinosaurus was certainly not much of a fighter. With thick skin, size, and arms as its best defenses, Spinosaurus would probably have lost to T-Rex most of the time in a fight on land. Conclusion: Tyrannosaurus Rex would win, but not without some challenge.