Extinction Of Dinosaurs Essay

million years ago, Dinosaurs diverged from their Archosaurs ancestors during the middle to late Triassic period. For 160 million years they have dominated our planet. They are dubbed the most successful species to have lived on Earth. However, 65 million years ago, the most recent mass extinction seemed to have caused all of them to die-off. What caused the demise of the dinosaurs and 60% of life on Earth at the time? How did it affect life on Earth afterwards? Are all of the Dinosaurs dead? Will this

observation and experiment. While speculation is the forming of a theory or conjecture without firm evidence. In From “Sex, Drugs, Disasters, and the Extinction of Dinosaurs,” Stephen Jay Gould discusses and evaluates the difference between science and speculation. Gould also examines three possible theories that could be accredited to the dinosaur’s extinction which are: sex, drugs and disasters. Gould believes that the theory of disasters is the most adequate out of the two other theories. This is because

Around 250 million years ago, dinosaurs were the premiers of the Earth. A few questions are posed when looking at the dinosaurs. What is classified as a dinosaur? How did dinosaurs come to rule? Did the same dinosaurs live for all 150 million years they were here? Where did they all go? Taking a look at the evidence, all the answers to these questions are there. Maybe even more questions can be posed from the answers to the ones above. A dinosaur is a hard term to describe because of all the

ancestor of dinosaurs, and how they came to rule the earth for millions of years. The author gives us an example of what the ancestor of dinosaurs may have looked like, by telling us that it “probably looked something like a chicken”. Just as there was a mass extinction that wiped out most dinosaurs, there was a mass extinction millions years before, that gave the dinosaurs an opportunity to rise and evolve. 252 millions years ago, between the Permian and Triassic periods a mass extinction wiped out

definitive explanation to explain dinosaurs' extinction, there are various theories that attempt to account for the mystery of their extinction. The theories that explain their extinction at the end of the Cretaceous period are the asteroid, the volcanoes, and the major climatic changes. The most popular theory for the extinction of the dinosaurs is that the Earth was hit by an asteroid or a comet. Was the impact actually the cause behind the dinosaur’s extinction? Or was it something completely different

However through this course of time, mass extinctions have taken place on planet Earth. One of the most recent mass extinctions, has as a matter of fact left various amounts of evidence of the creatures which roamed the Earth at that time. Such magnificent creatures which varied from a very small size to giant sizes. Creatures which are now known to humanity as dinosaurs. The name of this extinction was the Cretaceous-Tertiary Mass Extinction. This extinction took place roughly sixty five million years

Are we on the brink of a sixth mass extinction? Many say yes, but there is also hard evidence saying no. Nonetheless, scientists can prove five mass extinctions in history. The first mass extinction happened roughly around 445 million years ago. It was named the Ordovician Extinction. The species affected were known as Graptolite, which are different types of sea creatures. Their demise on Earth lasted around only one million years. Around sixty to seventy percent of the species disappeared, and

I 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 small

There were over 1,000 different species of dinosaurs (“Dinosaurs”) that lived and evolved for almost 185 million years (“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 and

org/media/pterodactyl-fossil/) the wing span for a pterodactyl is 3 feet or 1 meter, but I'm pretty sure it depends on the gender and if it's a child too. In the website http://nationalgeographic.org/media/pterodactyl-fossil/ they said quote “Pterodactyls were not dinosaurs! Dinosaurs are generally considered to walk upright, on either two legs (like T.Rex) or four legs (like stegosaurus). Pterodactyls