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Ice Age Extinctions Of The Megafauna
1,675 wordsICE AGE EXTINCTIONS OF THE MEGAFAUNA During the last Ice Age before humans arrived, the North American continent belonged to various forms of enormous, fantastic creatures. By the end of the Ice Age, most of these large animals had become extinct. Numerous attempts have been made to explain the disappearance of these animals, but there has yet to be a consensus. Among the theories that have been debated, two are predominant. They are the climatic change theory, and the overkill theory. The clima...
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Million Years Ago Radio And Television
1,529 wordsMedia nowadays is considered a window for learning and is also considered to be our main window to the world. Media has evolved from simple text in papers, to voices in radios, to voices with pictures in television and movies, to the very broad and information packed Internet. But as we all know, media has changed and evolved since then. Media then was primarily used to deliver news across the town and to beef up the people with the information they need for their everyday life. Then, newspaper ...
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Million Years Ago Sea Levels
1,218 wordsLong before there were any people, millions of years ago, dinosaurs ruled the world. This was known as the Mesozoic Era, the "Age of Reptiles. " Three different periods made up the Age of Reptiles, Triassic, Jurassic, and the Cretaceous Period. Out of these three periods, it is my opinion that the Cretaceous was the most magnificent time of the dinosaurs. The divide of the supercontinent Pangaea into separate continents was underway. The disjointing of Laurasia and Gondwana was concluded. In the...
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The End Permian Mass Extinction
3,001 words... verify the Chinese reports of iridium and they are fruitless. Anomalies can cause a build up of iridium in one place which would lead to what the Chinese have discovered (Erwin, 1993). Cosmic Radiation Global Cooling Global Warming Salinity The hypothesis that salinity decrease caused the mass extinction of oceanic life was first formed by Beurlen in 1956 (Maxwell, 1989). Evidence for this phenomena was based mainly on stenohaline groups such as the bryozoans, ostracods and corals which were...
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Million Years Ago Long Period Of Time
1,219 wordsFrom Water to Land (Revision) Abstract: The early tetrapods were the first vertebrates to actually walk the solid earth. They began their conquest of land in the Paleozoic era around 360 million years ago. The question many paleontologists have been asking for a long period of time is whether the anatomy for locomotion on land was developed in water for swimming purposes, or if it was adapted after the creatures became terrestrial. Recent findings of fossils indicate that the transformations of ...
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Million Years Ago Dry Land
722 wordsAbout four hundred and fifty million years ago, at the end of the Ordovician and in the beginning of the Silurian, the land was desolate and empty. Barren, hardly withered rock grounds, empty sand-, gravel- and clay plains, no green. Maybe some lichens. And at wet spots some algae with a couple of spider-like little creatures creeping around. In the neighbourhood of the mouth of rivers, where the water regularly flooded the land, it was probably green with algae. At such places, e. g. in Austral...
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Grolier Electronic Publishing Rio De Janeiro
1,740 wordsEarthquakes: Causes, Mapping, And Predicting Essay, Research Earthquakes: Causes, Mapping, And Predicting Earthquakes: Causes, Mapping, and Predicting Throughout history, man has made many advancements. These advancements have been made to make life easier. The one thing man cant do is to control Mother Nature. Mother Nature can cause many things such as earthquakes. The causes of earthquakes have been theorized in many ways. According to the book Predicting Earthquakes by Gregory Vogt, the Gree...
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Million Years Ago Millions Of Years
923 wordsReptiles Enjoyed Warm Arctic (Global Warming) An article written by ABC News writer Kenneth Chang discusses the change in climate of the arctic from ninety million years ago. Seven hundred miles from the North Pole, lies an island called Axel Heiberg, a barren land that scientists have dug up fossil bones of a cold-blooded reptile known as a champsosaur. How does this happen in an arctic, freezing land? How does a reptile that needs the warmth of the sun to survive, live in a frigid climate? Wel...
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Million Years Ago 5 Million Years
1,070 wordsHOW TOOLS TRANSFORMED PROTO-HUMANS INTO MODERN HUMANS According to archeological and physical record, tool use has had an enormous effect in the transformation of proto humans into modern humans. What stimulated tool use was the proto humans intrest in new and easier ways to do things. With the introduction of tools, body morphology changed and reproductive fitness increased. Evolution did not happened over night. It took 4. 5 million years for humans to get where they are today. Scientists have...
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