Dinosaur - 727 Words

Dinosaur Dinosaurs: Extinct or Natural Causes As geologic time goes, all the dinosaurs living on earth suddenly disappeared. How did these dominated and gigantic creatures really die? Was it a slow extinction through natural causes, or did it happen suddenly? These questions give rise to many different beliefs on how the dinosaurs disappeared over sixty-five million years ago. Something happened sixty-five million years ago, at the end of the Cretaceous period that was so devastating that it altered the course of life on earth. Extinction is easily defined: the birth rate fails to keep up with the death rate. However, the definition does not answer the question about the nature or causes of extinction. Since so many†¦show more content†¦A massive eruption may have saturated the atmosphere with carbon dioxide so the that a sharp rise in temperature occurred worldwide. The excessive carbon dioxide would have permitted solar energy to enter the atmosphere but would have blocked the radiation of most surface heat back into space, causing the â€Å"greenhouse effect†. rising temperatures could have killed off or reduced the activity of plankton, disrupting food chains and also disrupting the plankton’s normal role in converting carbon dioxide to oxygen through photosynthesis. It would have taken long for dinosaurs to become extinct. Dinosaurs may have also killed themselves. It is possible that they consumed poison from plants. The emergence of flowering plants could have poisoned them. These plants contained alkaloids. Smaller animals with lesser appetites could have survived the doses, but perhaps the dinosaur could not. Most mammals are smart enough to avoid these poison ness plants because of the bitter taste. The dinosaurs, however, may have not had the sense or the liver. They could not taste the bitterness or detoxify the ingested substances. This theory is not scientifically significant because there is no way of telling if the dinosaurs could taste, or how their digestive system worked. What if it wasn’t the dinosaurs that caused their own extinction, but something greater? Species of animals that have survived for millions of years have to be well adapted to their environment or theyShow MoreRelatedDinosaurs : Dinosaurs And Dinosaurs958 Words   |  4 PagesThere were over 1,000 different species of dinosaurs (â€Å"Dinosaurs†) that lived and evolved for almost 185 million years (â€Å"Dinosaur Facts†). Dinosaurs were some of the largest and most mysterious creatures to walk the Earth. Dinosaurs have helped scientists to understand the Earth and it s past by studying different types, how they lived, their characteristics and what caused their mass extinction. When, where and how did dinosaurs live? Dinosaurs arose around 200 million years ago and lived andRead MoreDinosaurs : What Are Dinosaurs?1619 Words   |  7 PagesPart A: What are Dinosaurs? Dinosaurs are land-dwelling reptiles that once roamed the Earth and the word comes from a Greek word that means terrible lizard. Dinosaurs are defined by their skeleton features, particularly the way they hold the limbs. Dinosaurs limbs support them from beneath, (like a horse), while modern-day reptiles (such as crocodiles and lizards) limbs come out from the sides. Dinosaur are a diverse species ranging in different shapes and sizes and were able to survive in a varietyRead MoreThe Fall Of Dinosaurs By Dinosaurs2185 Words   |  9 Pages 4/26/2016 English 12 Ms. Hous The fall of Dinosaurs It is hard to imagine that millions of years ago, the Earth was not dominated by humans, but by Dinosaurs. These great Beast’s, who were as big or bigger than cars, roamed the land. Some were giant killing machines, like the Tyrannosaurus Rex.Some are even alive today, while many people do not even notice. There have been countless theories as to how the dinosaurs became extinct. The dinosaurs ruled the land for millions of years, and it seemsRead MoreThe Discovery Of The Dinosaur Extinction Of Dinosaurs867 Words   |  4 PagesBefore the time of humans, dinosaurs ruled the Earth. These creatures were the greatest predators until they stopped roaming the planet. Dinosaurs died 65 million years ago at the close of the Cretaceous period. Of course, we are not exactly sure what ended the reign of the dinosaur since humans were not around at the time. However, scientists came up with countless possible theories on how dinosaurs demised. A few of the crazier theories include alien abduction or dinosaurs never existed. CertainRead MoreThe Extinction of The Dinosaurs1262 Words   |  6 PagesExtinction of Dinosaurs Many different theories exist as to why the dinosaurs went extinct. We know for sure most dinosaurs died out around 65 million years ago. The majority of scientists agree on a number of theories as to what brought the end of the dinosaurs. The most popular theory is that an asteroid ended the reign of the dinosaurs. Another theory, massive climate change in the pre-historic atmosphere, caused all the dinosaurs to die. Some scientists believe that mammals out competed dinosaurs forRead MoreDinosaurs Are Awesome526 Words   |  2 PagesI still want to see how different earth was during that time so I could confirm and add to the overall knowledge about the dinosaurs. The Cretaceous time period was the last time period in which dinosaurs are seen. This time period spanned from 144 million years ago (mya) to 66 mya; right after the Jurassic time period and before the Tertiary. This is a time when dinosaurs were at their height with many thousands of different species known or yet to be identified. Our earliest ancestors were smallRead MoreThe Discovery Of The Dinosaur865 Words   |  4 PagesZhenyuanlong Suni was dinosaur that was officially announced on July 2015 when the official scientific report (written by the paleontologist who studied it) was published. The dinosaur was given it’s name after Zhenyuan Sun who took it’s fossils for a deep study upon being discovered by a local farmer. The fossils were taken to Jinzhou Paleontological Museum by Zhenyuan Sun for further examination. The specimen was further studied by paleontologists Stephen Brusatte of the University of EdinburghRead MoreEssay on Dinosaurs964 Words   |   4 Pages Just as most dinosaurs are believed to be wild and mean, most are. Unlike the wild and ferocious Tyrannosaurus Rex, the Velociraptor, is a smaller, agile dinosaur. The Brontosaurus can be found with the bigger, more gentle dinosaurs. The Tyrannosaurus Rex, Velociraptor, and Brontosaurus differ greatly in their body structure, diet, and discovery. nbsp;nbsp;nbsp;nbsp;nbsp;The Tyrannosaurus Rex was a very large dinosaur. Measuring 50 feet long, the Tyrannosaurus stood over 20 feet tall. TheRead MoreThe Extinction Of Dinosaurs904 Words   |  4 Pages Cribbins 1 Hook. The extinction of dinosaurs is a mystery in itself that has stumped scientists all over the world for decades, and they still look for new answers every day. Scientists know some background information, but cannot connect the dots to see the bigger picture. There was little interest in the topic until Luis and Walter Alvarez proposed a groundbreaking hypothesis, which today we call the â€Å"Alvarez Hypothesis†. This new idea of the Alvarez’s was exciting, and therefore gotRead MoreThe Geologic Scale Of Dinosaurs1419 Words   |  6 Pagesfood, or the environment changes making it hard for some organisms to survive the new environment (Ghose). Dinosaurs started developing after a mass extinction of the Paleozoic Era just about 125 million years ago. Dinosaurs lived through the Mesozoic Era then later died off during another mass extinction about 65 million years ago, starting the beginning of the Cenozoic Era. Almost all dinosaurs and half of the other plants and animals went extinct, some scientist think that an asteroid hit the earth