Permian–Triassic extinction event Essays

Georgios Kepertis Earth 102-6: Death of the Dinosaurs Paper 4: Permian-Triassic Extinction 12-7-2015 The Permian-Triassic Extinction Event: When Life on Earth Almost Ended An event that marked a great transition, an event so overwhelming that most creatures on Earth could not handle it; its power so immense that even plants and insects were almost eradicated from the face our planet. If it were to happen today, humans would most certainly be defenseless against the brute forces of nature, and even

defines extinction in relation to biology as a species, family or a large group having no living members (Oxford, 2016). With the estimation of the four billion species that evolved on earth during its 4 billion year existence, about 99% of them now are extinct (Novacek, 2001). This displays how natural extinction is, but it is usually stabilized by speciation (Barnosky, 2011). A major extinction event is one in which many species meet their end over a short period of time, these events are grand

Mass Extinction. Source: https://worldatlas.com Mass extinction has impacted our earth's evolution tremendously. From as far back as 500 million years ago during the Cambrian period, to as close to us now 65 million years ago during the Cretaceous-Tertiary extinction event, and all 3 events in between have affected the animals and plants surrounding our planet gigantically. Mass extinction is when there is a rapid decrease of animals and plant species on earth due to the earth's natural disasters

There have been five great mass extinction events in history: Ordovician, Devonian, Permian, Triassic, and Cretaceous. And now, we may be in the middle of a sixth. The Sixth Extinction: An Unnatural History is a Pulitzer-Prize-winning book by Elizabeth Kolbert. Kolbert uses a comparison between the past and present to assert that we are living in the sixth great mass extinction, only this time humans are the asteroid. It is well-written with a good blend of scientific and common language so that

Life, and especially nature, is associated with cycles. Biota is constantly going through a cycle of birth, procreation, and death. Earth is constantly experiencing mass extinctions, with five already in its history. Even basic cycles like photosynthesis exist and allow plants to create the energy they need. Perhaps the best-known cycle to much of the public, however, is the annual cycle of seasons. It is through this cycle, and a plenitude more in The Last Winter, that director Larry Fessenden seeks

Gabbie Berg Edwin Elias SOAN 101 November 18th, 2017 Book Review The Sixth Extinction: An Unnatural History by Elizabeth Kolbert is a story about a journalist who seeks to investigate the sixth extinction and particularly what species are headed towards that fate. There are been a total of five mass extinctions so far, and Kolbert decided she could answer if there would be a sixth in this book. Kolbert begins her investigation by traveling to all different parts of the globe, from Peru to the Great

endeavored to unravel the enigma surrounding the Cretaceous-Tertiary Mass Extinction, which took place 65 million years ago. This event is most notorious for the halt of existence for the dinosaurs, undeterred by the fact that nearly three fourths of all flora and fauna species subsisting on Earth went extinct. Consequently, Paleontologists have proposed a profusion of theories to decipher how the Cretaceous-Tertiary Mass Extinction transpired. However, a sheer bulk of the theories makes no sense whatsoever

physiological characteristics. They evolved from a group of reptiles called the synapsids. These reptiles arose during the Pennsylvanian Period (310 to 275 million years ago). A branch of the synapsids called the therapsids appeared by the middle of the Permian Period (275 to 225 million years ago). It was over millions of years that some of these therapsids evolved unique mammalian features that helped them to live in adverse environment situations.

mass extinction happened, wiping out all the dinosaurs. This topic is very important because some creatures have started to go extinct.In my position that the number of creatures has increased over time, that the number of creatures are going to continue to increase.In this essay you will read about the number of creatures back then, you will also learn how the animals over time increased. How the number of animals has increased now and will it increase in the future. The first Mass Extinction was

In the scientific article, “Ancient mass extinction may have shrunk Earth’s creatures” by Sid Perkins, Perkins explains that the mass extinction that occurred millions of years ago may have a correlation to the size of organisms on Earth’s surface in the present. Perkins states that long ago organisms used to be the size of school buses, but information from a new study shows that the mass extinction caused most of the vertebrate species to shrink to the size of a human forearm. Lauren Sallan, a

He tries to establish that the extinction of the dinosaurs did not occur exclusively due to one reason, which was the asteroid strike, but a number of factors were responsible for their extinction as well. He provides the evidence to his previously established claim in the article and rids himself of the burden of proof. Brusatte mentions that the factors which caused the extinction include the bad timing of the asteroid strike, the drop in sea level and

Extinction’s Conclusion Throughout The Sixth Extinction, author Elizabeth Kolbert explains how several different natural species have gone extinct or seen their populations dwindle. Each section is unique: no species dies the same way. Kolbert elaborates how extinction has never been uniformitarian or catastrophist but rather a combination of the two. Consequently, the last chapter effectively demonstrates the tragedy of an anthropogenic based extinction but fails to express any urgency or necessity

Paleogeography This geological evidence is only one piece of the puzzle and only gave paleontologists some clues regarding the changing environmental conditions that played a role in the Devonian extinction. Examinations of the changing paleogeography during this time also shed light on factors that may have affected the placoderms. The world map of the Devonian looked very different from the world map today. Things were moving towards the formation of Pangea, which meant that continents were coming

When you are attacked by bees, this can prove to be a very traumatic experience. Learn a few ways to prevent a bee's difficulties in your home. Here are some basic facts about bees. There are about 25,000 known types of bees in the world. They are classified as "Hymenoptera", a sort of insect-like the hornet, the sawflies and the ants. Bees are said to grow from a hornet. In fact, it is not difficult to accept as true, because they are very similar to each other, especially the threat they give

Introduction While we awake in the morning and are on our way to work or may it be late at night while we are driving we have always seen these animals around us. We also have even fallen victim to hitting them with our cars. These animals are Deer, what if I was to tell you that they had a common ancestor called the Irish elk? The Irish elk was known for its monstrous size, it has also been known to be the largest deer that has ever been documented to live in the prehistoric era. The Irish elk

(ICDP) and the International Ocean Discovery Program (IODP) drilled into the peak ring. The expedition focused on the intact peak ring and exceptional rock arrangements. The expedition helped to answer critical questions about the Chicxulub impact event and the formation of peak rings on planetary

this era and lasted about 55 million years (2). The Cambrian Period starts at around 543 million years ago. The start of this period is marked with the first appearances of worms that dug horizontal burrows. The Cambrian Period ends with a great extinction event that occurred 490 million years ago (1). This period is known for an incredible evolutionary burst that occurred during its time. This is known as the Cambrian Explosion (3). This is when many major groups of animals first appear in fossil record

in a period of mass extinction, and in the past, Earth has experienced five. Leading causes for those periods include rapid climate change and natural disasters, but now scientists are accusing a new suspect– humans. The question that remains is: will humans survive the sixth mass extinction? The answer to that depends on our actions and how we respond to the growing issues in our world. The thrilling documentary directed by Academy Award-Winner Louie Psihoyos, Racing Extinction argues that every action

Five Years of Analyzing... The song “Five Years” is a dramatic story told by Bowie. The song tells us about earth beginning to die, and in five years time, it will be gone. The song goes on to then tell us about all the things that happen in the world when the news is broken to them by the newsman on the tv. The stylistic choices used by speakers and songwriters help give the song/poem depth, purpose and add emotion. David Bowie uses stylistic choices in the song “Five Years” to add meaning to

had experienced a catastrophic extinction. How often have you wondered what happened to the dinosaurs? Do you know what factors contributed to their rapid extinction? Now, let me tell you my theories on behalf of their rapid disappearance from our Earth. Photo credit: William The dinosaurs seemed to have been the victims of raining meteorites before they could attend the emergency class held by their ancestors. The meteor attack was not wholly an incidental event in their world. Instead, its attack