Dinosaur Extinction Report

Humans, Homo sapiens, migrated out of Africa in waves successively increasingly, crossing over to Eurasia before migrating into North America. The residing megafauna in North America would face Paleo-Indians. The genesis of the extinction of megafauna have has been hypothesized to credit to the introduction of modern humans. The sudden introduction of a hunting and big-game predator into regions with megafauna led to the overkill of large faunas. The overkill hypothesis alludes to the fact that extinction of large fauna species such as mammoth’s birds, etc. occurred after modern humans were introduced to the environment. To prove the overkill hypothesis was caused by human hunting large faunas, scientist Steve Wolverton evaluated the support

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Stephen Gould’s essay “Sex, Drugs, Disasters, and the Extinction of the Dinosaurs” completely agrees with Joseph Williams and Gregory Colomb’s essay “Argument, Critical Thinking, and Rationality.” Gould’s essay deals with three theories for the extinction of the dinosaurs, two of which he argues are entirely invalid because they are not in accordance with the basic rules of argument laid out by Williams and Colomb in their essay. Gould also states that the third theory of dinosaur extinction, natural disaster, follows all the rules that Williams and Colomb espouse, and thus is a sound argument. Gould, Williams, and Colomb all state that the world has a problem with irrational arguments being shoved down people’s throats, and call for a

Nobody knows for sure exactly how the dinosaurs became extinct. However scientists have speculated for decades about possible events that caused the dinosaurs to die out. Possibilities range from asteroids, to volcanoes, to climate changes. One of the more popular or well-known extinction theories involves the belief that an asteroid struck the Earth, causing devastating effects, and triggering mass extinctions around the end of the Cretaceous period.

It is said that there has been rare and precious Dinosaur bones discovered in the Eromanga sea, this almost proves that Dinosaurs once roamed around the shores. Also many of the significant events in Geological history, over the past 600 million years can be observed at Hallett Cove. Some of the oldest rocks have been found in these seas. The finding of the Ediacaran could potentially mean that there can be dinosaur fossils found in the ocean, or even that relatives of the ediacaran could be considered fossils and could be found in the sea.

In Stephen Jay Gould’s “Sex, Drugs, Disasters, and the Extinction of Dinosaurs”, Gould investigates three possible theories hypothesizing the reason behind the extinction of dinosaurs. The first theory suggests that dinosaurs became extinct due to a rise in temperature, which caused sperm to die, leading to the sterilization of male dinosaurs. The second hypothesis offer that many dinosaurs consumed bitter plants that contained psychoactive agents which their lives could not detoxify out of their systems. The last speculation about the dinosaur’s extinction is that a large cloud of dust formed in the atmosphere after an asteroid hit Earth’s surface. This dust cloud blocked out the sunlight, causing temperatures to drop and made photosynthesis impossible. Gould uses these three theories to lead to his central claim that science isn’t just about making fascinating claims, but should have a well developed hypothesis.

Assess the different hypotheses put forward for the mass extinctions at the end of the Permian and Cretaceous (KT) Periods.

First,the reading claims that one cause for the diprotodon extinction was the fire set by humans that lead them to become extinct.However ,the professor opposes this point ,he states that the land was so large and was flat with less fertilie soil, so the possibility that the fire causes the diprotodon to lose its home and enviroments is not true .

Define five (5) major tasks, each with one to two (1-2) subtasks. Also write a brief description for each task.

Although many people seem to have an understanding or guess as to how the dinosaurs and similar species may have become extinct around this time period, their are many theories out there suggesting otherwise. So in light of that my question is , What mite have been the primary cause or ( causes ) of the Cretaceous-Tertiary Mass extinction ?. This particular question interested me primarily on the fact that it not only took away many species from earth, but also the many different theories that associate with this mass extinction. Just as quick as these species were taken from the earth , their origin for their demise is just as important.

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.

Dinosaur extinction: An analysis of events and theories that possibly led to the dinosaurs' demise.

Over 98% of all organisms that have lived on Earth are now extinct. A mass extinction event occurs when a large number of species die out within a small time frame (relative to the age of Earth). Mass extinctions are intensively studied for both cause and effect, as there is usually room for debate regarding catalysts that precede the extinction and the massive influx of new biological species that follows. There have been five major mass extinctions, dubbed the “Big Five,” that have wiped out at least 50% of the species living at those times. The most well known mass extinction of the Big Five, with the decimation of every species of non-avian dinosaur, is the Cretaceous-Paleogene

The biggest mystery surrounding the dinosaur is how did they die? For over 130 million years dinosaurs ruled the earth. Then 65 million years ago, at the end of the Cretaceous period, they died out.

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”). Also, over a long period of time, climate gradually changed. Ocean habits changed, temperatures grew much more extreme causing scorching summers and frigid winters (Norell, Dingus, and Gaffney). Radical temperature changes like these led to a green-house effect, making life for the dinosaurs a lot