This can of course only be propagated by completely ignoring volumes of geological and paleontological evidence showing clearly that these creatures were destroyed in a natural cataclysm. Deloria reviews some of this evidence, as well as some of the evidence of Native American tradition, which described this catastrophe in some detail. In fact, native traditions from all over the world, as Ignatius Donnelly and Immanuel Velikovsky observed, tell much of the same story. People like Paul Martin however, studiously ignore this material. It may be noted that the scholarly consensus is now moving decisively away from Martin and his "overkill" theory in favor of Deloria's catastrophe. One of the most recent books on the topic, The Cycle of Cosmic Catastrophes, provides a comprehensive overview of the latest scientific findings, such as the iridium layer at the termination of the Pleistocene, which speaks conclusively of a cataclysm. I wish that Deloria was alive to see such a positive…
When people hear the word extinction, they think of the word that they have been hearing since they were small toddlers. When this word is heard most refer to the dinosaurs becoming extinct. In the book the sixth extinction it mentions how…
Sereno, Paul C. "The Evolution of Dinosaurs." The Evolution of Dinosaurs. N.p., 25 June 1999. Web. 12 Dec. 2012.…
There were many different theories that arose in regards to how dinosaurs became extinct. Some of the theories are floods, ice ages, poisoned food supply, etc. However, what most likely happened was a meteor crashing into the planet. The meteor caused an immediate impact on the life that it hit directly, causing them to vanish. The after effects were a drastic climate change and the fact that the meteor most likely caused a sonic boom that also ended the lives of many other animals. After the meteor hit, it probably caused volcanoes and made much of the land uninhabitable due to wild fires. Additionally, after this period of heat there was chance of a period of cold and dark. Together, this all combined was the reasoning behind why the dinosaurs, and most life went extinct, despite being in their prime and the most diverse they had ever…
My personal theory is that all three of these factors played a part in the Mega-beast’s extinction. If the Clovis People and the climate change together had taken out, say, 59% of the Mega-beast population, and a comet struck the Greenland Ice Sheet,the results could be catastrophic. The entire Mega-beast population could be wiped out entirely, and even if there were survivors, they would be wiped out quickly by the Clovis People and/or the dramatic climate change. There are spikes of Iridium and hexagonal diamonds-which can only be formed by massive impact and incredible heat, hotter than a volcano-in both the layer of ice in the Greenland Ice Sheet that was from the Ice Age and the Black Mat layer in Arizona.…
If a meteor impact killed the dinosaurs, it was most likely due to the resulting…
There are many theories on how dinosaurs became extinct but scientists have not yet found a proven reason why. About sixty-five million years ago Dinosauriformes, or as we call them Dinosaurs, walked and roamed planet Earth. These massive carnivores, herbivores, and omnivores lived many years on earth before humans appeared. There were several variations of dinosaurs such as land, sea, and air dinosaurs. For a millions of years the dinosaurs thrived in their environment. They had an abundant food supply to eat and they had ample space to roam and reproduce offspring. Unfortunately the dinosaurs did not last forever since they all mysteriously became extinct. Three of the main theories on how dinosaurs became extinct are climate changes, an asteroid impact, and massive volcanos erupting.…
Bibliography: - Internet resources:Siegel, L. (2000). The Five Worst Extinctions in Earth 's History (online),Available from: http://www.space.com/scienceastronomy/planetearth/extinction_sidebar_000907.html (Accessed 13 May 2008).…
Dinosaurs roamed the Earth 230 million years ago. They were on this planet for over 160 million years. During this time, there were three different time sections for the dinosaurs. There was the Triassic period, Jurassic period, and the Cretaceous period. The Cretaceous was the last period and they became extinct in this time period. Not all dinosaurs became extinct; they have ancestors in today 's the world. The ones that did not survive, no one has a clue how they died out. There is speculation on how they died out, from ice bergs moving and flooding the planet or tar pits. Guess this is something that no one will know for a while.…
Assess the different hypotheses put forward for the mass extinctions at the end of the Permian and Cretaceous (KT) Periods.…
World-famous paleontologist, Stephen Jay Gould, says that the dinosaurs were killed by a large asteroid that collided with the earth. Furthermore, many scientists agree with Gould. Therefore we conclude that the dinosaurs were probably killed by an asteroid. – appeal to unqualified authority…
The Permian was the last period during the Paleozoic era. It occurred approximately 299 million years ago and was the point in time in which much of the earth’s land mass came together to form the supercontinent, Pangea. While years of study has relieved the climate conditions and life forms present during this period, the events surrounding the mass extinction that signified its end remains a mystery today. The end-Permian mass extinction is regarded as the largest mass extinction event in the earth’s history, with marine and terrestrial life declining by 95% and 75% respectively (Shen et al. 2014). While clear that life on earth was greatly affected, many scientists are conflicted on the cause/causes of the extinction event.…
For over 150 million years, dinosaurs dominated Earth. They were incredibly successful-so successful in fact that all of the other animal groups had no choice but to play a secondary role in nature. 65 million years ago, however, every species of dinosaur went extinct as well mosasaurs, plesiosaurs, pterosaurs, ammonites, and many families of brachiopods and sea sponges. Also, many shark species as well as most vegetation did not survive(“Dinosaur Extinction”). What could have possibly killed off the dominant animal group of the time? The answer to this question is still unclear but there are many hypotheses that attempt to explain this extinction event. To find out exactly how this happened, evidence must be gathered not only from fossils…
The exact reason for the Pleistocene extinction is still not known, this data implies that top-down forces and humans are the reason the extinction happened. This data is important because during the Anthropocene humans continue to put animals at risk for another extinction. The authors used data from the Pleistocene and recent data to show that high rates of predation and humans could have lead to the extinction. Both carnivores and humans caused the extinction, because both were competing for prey which lead to a lower percentage of megafauna.…
The Permian Mass Extinction is defined as one of five major mass extinctions which the earth experienced. Mass extinctions are caused by great changes of environment, and these changes take creatures’ ways of living. Geologic factors are one of main factors which generate big changes.…