Extinction event

in a layer of dust (Smith, 2005). In Mexico there is a crater with a diameter of 180km called Chicxulub that has been dated to have first surfaced 65 million years ago leading scientists to believe that whatever caused the crater lead also to the extinction of the dinosaurs. Iridium, a rare metal that is also found in asteroids, has also been discovered as a layer covering the whole surface area on the Earth. Asteroids contain Iridium, a rare metal, this same metal has been found in a layer…

tyrannosaurus rex and the triceratops once roamed the Earth. Suddenly all these great creatures disappeared and it’s not quite sure how they vanished from existence. There are several theories to explain what is known to be the most popular mass extinction of all time. Asteroid The belief that an asteroid struck the planet earth is the most common and most believed theory. This theory has more evidence to back it up than just a giant rock hitting the Earth. This theory is backed up by the…

How did the dinosaurs die There are many theories on how the dinosaurs became extinct over 100 million years ago. The theory that is most common, is the asteroid theory. The asteroid theory proposes the idea that an asteroid hit the earth, reduced levels of sunlight, and dropped temperatures, resulting in plants being unable to grow, the plant eaters dying, and leaving no food for the meat eaters. This theory is like a major chain reaction, wiping out every dinosaur on the planet. Another…

the temperature lower down abruptly. Dinosaurs could not adapted this situation and extinct.(Joerger Fall(2011), Science Illustrated Magazine, Germany) To sum up, these are the main four theories to account for the dinosaurs extinction. Although the truth of dinosaurs extinction has not been proved, I believe people can solve this question in the future because the highly developed science and…

GANGANNA RAVINDRA Abstract— About Sixty-five million years ago, one of last non-avian reptile species called dinosaurs vanished from the earth. The extinction of this huge animal is a never-ending topic of interest, the mass extension of dinosaurs occurred over a very short geological period. Keywords— Non-Avian Dinosaurs, Mass extinction, Dinosaurs extinction theories; Asteroid impact; Volcanism; I. INTRODUCTION Dinosaurs are the certain group of reptiles which influenced and ruled the…

In her book The Sixth Extinction, Elizabeth Kolbert writes that there have been five mass extinctions in the history of planet earth. She asserts that currently the earth is on the precipice of a sixth mass extinction. In contrast with the previous five, according to Kolbert this sixth extinction is almost entirely caused by humans and our exploitation of the earth. In each of the book’s thirteen chapters, Kolbert highlights a particular species that is now extinct and analyzes the causes and…

asteroid that is roughly 10 kilometres across, hit Earth on the coast of the Yucatán Peninsula in Mexico. It caused a huge explosion and left a crater that is about 185 kilometres across. This asteroid impact is commonly known to be the reason for the extinction of three quarters of the dinosaurs. (4) The asteroid soared through the sky at more than 40 times the speed of sound. (6) The earth moves through space in its orbit around the sun at 107,000 kilometres per hour. This makes the…

alternative hypotheses that might have caused this mass extinction by explaining the main reasoning behind each of these premises. The author exposes the points of views of different scientists and geologists in regards to the death of the dinosaurs, which- somehow- remains one of the most heated and contested “battles in science”. Particularly, the paper explains the stance of one geologist from Princeton who is an advocate of a different dinosaur extinction theory. Dr. Keller and her team…

The MIT and princeton researchers used high precision geochronology to determine the age of rocks on the so called deccan traps. To evaluate whether the extinction happened before or after the volcanic eruptions. The researchers collected more than 50 samples of rocks from that certain region in india to record data, Fortunately, samples from both the bottom and top of this volcanic layer contained zircon…

Dinosaurs In The Jurassic Time Period By: David Wallace This project is going to be based on some of the dinosaurs in the Jurassic Time Period and it will give information about that dinosaur as well. Vertebrates taking to the air like the pterosaurs and the first birds. This was the Jurassic Period, 199.6 to 145.5 million years ago, a 54-million-year chunk of the Mesozoic Era. Air, land, or sea, dinosaurs came in all shapes and sizes in many different places around the world. The first…