Tyrannosaurus Rex Dinosaur Facts

Video Transcript

Okay, now for T-Rex himself. Tyrannosaurus Rex, the king of the Dinosaurs lived sixty-five to seventy-five million years ago. Was basically a North American Dino, with relatives in Asia and possibly Europe. Now he stood twenty feet tall, weighed seven tons and had the most powerful jaw of any Dinosaur on planet Earth. But please note, he only had these mutated short limbs. As I said, his antecedents were gradually losing the use of those arms. And the question is, did they serve any purpose at all? For example, it doesn't look like he could've used them to put food in his mouth. Would've been very good for defense. One theory is that T-Rex and some other Dinos may have slept crocodile fashion, so that when they awoke in the morning, these short limbs may have been very powerful and helped them get to an upright position so he could go hunting. Now was he a scavenger or a predator? All of these predatory Dinosaurs are known as Theropods. Approximately one quarter of all Dinos were carnivorous, three quarters were vegetarian or herbivores. Now the one question some critics have said, he could move that fast. They've estimated he may have moved nineteen miles per hour, which sounds fast enough to me to catch some of the slow moving Dinos he would have been attacking. Also the question about his vision. Binomial vision, seems not to be very pronounced in him. For example, we have crocodiles that have only twenty degrees binomial vision, but cats, which are excellent predators have a hundred and thirty-five degrees of binomial vision. That is where the left and right eye intersect. They've determined that his binomial vision was about forty degrees. And certainly if crocodiles can survive, T-Rex could have survived as a hunter. But if he couldn't find his dinner, then he would have been a basically a predator, or a scavenger who ate dead Dinosaurs. Acarian, yes. Now, the question is, were there any small T-Rex's? And in India, they've found one. The Rajasaurus, which is certainly very similar, but stood only about ten feet tall, and weighed only one to three tons. Yes, and again, for each foot we're talking about twenty foot Dinosaurs, that's a two story Dinosaur. Also a vicious predator, the first major Dinosaur found in India. Rajasaurus, the regal Dinosaur, along with T-Rex, the king of the Dinosaurs.

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