Extinction Of Dinosaurs Essay

632 words - 3 pages

Extinction of Dinosaurs

     Two-hundred and thirty million years ago the first dinosaur-like
creature roamed the earth. Within five million years it could be considered a
dinosaur. They were soon at the top of the food chain. They populated every
continent. Then 65 million years ago they vanished. The most powerful
creatures ever to live on earth had become extinct.
     Dinosaurs were not the only victims of this "mass extinction." There
were many other species that were killed off. During what is known as the K-T
extinction (K stands for Cretaceous, T stands for Tertiary), many species and
families became extinct. These include all marine reptiles such as plesiosaurs,
mosasaurs, ichthyosaurs, and ammonites, swimming and flying reptiles, sea
crocodiles, and foraminifera. In addition to that there were many bony fish,
sponges, snails, clams, and sea urchins became extinct.
     Paleontologists have proposed scenarios that could have caused these
extinctions. One such scenario involves the growing number of small mammals
which ate dinosaur eggs, and therefore caused the dinosaurs' birth rate to drop.
The birth rate became smaller than the death rate and the dinosaurs died out.
This, however, is not a plausible scenario. This would only account for the
dinosaurs, but not all the other creatures of that time. Paleontologists needed
to come up with a more plausible and devastating theory that would include the
other creatures that died out 65 million years ago.
     There have been several major theories that have come about that can all
be substantiated. Any one of these events, theorized by paleontologists, could
have brought an end to the dinosaurs and all the other species that died with
them. Since there are many theories about this I will not write about them all.
I have chosen the theory about death by Cosmic Collision (an asteroid).
     In 1980 Luis Alvarez and John Sepkowski Jr., famous geologists, blamed
the extinction of the dinosaurs on a large celestial body which hit the Earth 65
million...

Find Another Essay On Extinction Of Dinosaurs

What Really Killed the Dinosaurs? Essay

885 words - 4 pages Dinosaur stress: Stress on the dinosaurs is a possible solution for their extinction. This theory was first thought up by Heinrch K. Erben when he found that the shell thickness of a certain type of dinosaur species decreased as time went on. It was thought that the warm climate and good habitats in the Cretaceous period could have caused over population of dinosaurs, thus an increase of stress on the dinosaurs would develop. Stress is known to

What Really Happened to the Dinosaurs?

891 words - 4 pages /frame.php?page=dinosaurs Hutchison, R. , What About Dinosaurs? Retrieved from http://biblestudyweb.org/dinosaurs.html (2001). What Killed The Dinosaurs? Retrieved from http://www.pbs.org/wgbh/evolution/extinction/dinosaurs/asteroid.html The State of Queensland. (2010). Why Did The Dinosaurs Die Out? Retrieved from http://www.qm.qld.gov.au/microsites/dino/02-dinosaur-extinction-theories/dinosaur-extinction-theories.html

Dinosaurs

764 words - 4 pages top two different beliefs which is scientific and religious. This paper explains how different the two are from each other. What one believes is the true story on how it happened the other believes something different. The scientific belief on how the dinosaurs went extinct. Sixty-five million years ago the dinosaurs went extinct with more than 50% of other life forms on this planet. This mass extinction was so big that for many years it was used

Dinosaurs

779 words - 3 pages activity, climatic change, and continental drift. Independent evidence indicates that sea levels did fall and temperatures dropped at the end of the Mesozoic Era, a time when continents were drifting apart and new mountain ranges were rising. Although none of these conditions is likely to have been solely responsible for the extinction of the dinosaurs, collectively they may have been important. Whatever the cause, the dinosaurs are now gone. In a way, however, they may remain. That is, many paleontologists consider birds almost certainly to have evolved from some small bipedal dinosaur during the Jurassic. If so, the children of the dinosaurs still exist today.

Dinosaurs

715 words - 3 pages indicates that sea levels did fall and temperatures dropped at the end of the Mesozoic Era, a time when continents were drifting apart and new mountain ranges were rising. Although none of these conditions is likely to have been solely responsible for the extinction of the dinosaurs, collectively they may have been important.Whatever the cause, the dinosaurs are now gone. In a way, however, they may remain. That is, many paleontologists consider birds almost certainly to have evolved from some small bipedal dinosaur during the Jurassic. If so, the children of the dinosaurs still exist today.

Extinction

1174 words - 5 pages As for the extinction of the dinosaurs the only solid fact is that no trace of dinosaur has been found after the Cretaceous. This calls for ideas of their sudden disappearance, and a great numbers of theories have been proposed, many of which with a preference for the dramatic.It should be emphasise, however, that there is no reason to think that the dinosaurs disappeared suddenly. And there is neither any reason to think that they disappeared

Theories Explaining the Demise of the Dinosaurs

1352 words - 5 pages asteroid was so large and landed with such force that it effectively ended the dinosaurs reign over the earth. However, recent evidence and research reported in Proceedings of the National Academy of Sciences suggests that this could not have been the case, because the Chicxulab crater predates the mass extinction by roughly 300,000 years. Rather, the evidence suggests that two or more impacts caused the mass extinction experienced by dinosaurs

The Lost World. Interview with dr Ian Malcolm

1151 words - 5 pages when we have means of controlling the dinosaurs we might try to bring them back again.4. The dinosaurs on Isla Sorna, are they still there?Yes, we believe that this time we should be studying them instead of destroying them. We have set up a surveillance system to observe the dinosaurs for years to come. Perhaps this way we might learn about how we may protect ourselves from these creatures and perhaps about their evolution and extinction.5. You

What Really Happened to the Dinosaurs?

903 words - 4 pages lived, when the dinosaurs were alive. The only way to get some clue about what they looked like and how they lived is all in the fossil layers under the earths surface. However, around 65 million years everything changed to cause the extinction of those wondrous animals. Most scientists think that an asteroid hit the earth and wiped them out. But there's a new theory, Professor Gerta Keller, who is also a Paleontologist wrote that, while her

Theories on Dinosaur Extinction

1465 words - 6 pages Theories on Dinosaur Extinction What killed the dinosaurs? Several theories have been brought up over time to answer this question. It has been of vast interest to many scientists how creatures the size of the dinosaurs could have been wiped out of existence. Proposed Theories Climate Change Theory Some scientists propose that climate change was killing the dinosaurs before the famous asteroid struck. Fossil evidence shows

Mass Extinction

2398 words - 10 pages ABSTRACT Several mass extinctions have occurred during the Earth’s history. The Cretaceous – Tertiary Boundary (K-T) Extinction caused the loss of at least three-quarters of all species known at that time including the dinosaurs. The cause of this mass extinction is a controversial subject among scientists but the fossil evidence of it’s occurrence is abundant. INTRODUCTION The K-T Extinction occurred 65 million years ago. Many species

Similar Essays

The Extinction Of The Dinosaurs Essay

2112 words - 8 pages Rapid climate change also ends up on the suspect list of possible dinosaur extinction events. During the latter part of the Cretaceous Period continents broke up causing volcanoes to erupt and fill the sky with gas and ash resulting in a drastic climate change (“Dinosaurs Climate Change and Biodiversity”). The shifting of continents changed the Earth’s landscape, altering weather patterns and overall climate (“Dinosaur Extinction Theories

The Causes Of The Dinosaurs’ Extinction

1513 words - 6 pages PAGE PAGE 1 Elizabeth Hoover Research EssayMay 7, 2013The Causes of the Dinosaurs' ExtinctionAbout sixty five million year ago something happened to change the Earth. At the end of the Cretaceous-Tertiary Period seventy-five to eighty percent of all animal species, including dinosaurs, became extinct. This event is known as the K-T mass extinction because it occurred at the boundary between the Cretaceous (K) and Tertiary (T) time periods

What Really Happened To The Dinosaurs?

1322 words - 5 pages There has been a debate about what happened to the dinosaurs since they were discovered. There are many thoughts of what happened to the dinosaurs, the two main theories behind the extinction are scientific and religious. Proof for both theories do exist and debates between scientists are still going on to which one really happened. It is a mystery as much for Evolutionists as it is for Creationists about the extinction of the dinosaurs. The

What Really Happened To The Dinosaurs

949 words - 4 pages science provides and also the theories and evidence that religion provides. After I write about the scientific and religious points of view on dinosaurs I will then give my own opinion on which seems more believable and what i think happened to the dinosaurs.Scientists and paleontologists believe that a massive meteor strike killed off all dinosaurs. Scientists also believe that the meteor was only the final blow, they believe that all the creatures