o Because this date corresponds approximately to the beginnings of village life in a few parts of the world, the first undisputed peopling of the Americas, the end of the Pleistocene Era and last Ice Age, and the start of what geologists term the Recent Era. Plants and animal domestication began in at least one part of the world within a few thousand years of that date Chapter Two: A Natural Experiment of History How does the fact that the Maori defeated the Moriori (a “natural experiment of history) support Diamond’s
These are important to prove evolution. Convergent evolution includes three very important parts: (a) common ancestry, (b) speciation, and (c) natural selection. Evidence of a continental drift involvesis marsupials spreading across oceans that did not yet exist, making their travel across vast bodies of land possible. A key examplenother supporter of the a species that experienced continental drift is the Glossopteris. This tree was only able to grow in warm climates and had a seed that could not float, yet fossils of this tree are found in different hemispheres of the world today.
He claimed that each of the present continents was once joined together as part of a super continent called Pangea. He believed this because he saw that in certain areas continents would fit together for example the west coast of Africa fits together with the east coast of South America, therefore they must have moved apart from one central mass. Other evidence was shown to back up this theory such as the fact that glacier derived clays are found in all of the continents in Gondwana forming one half of Pangea, as one striations in rocks of Carboniferous age. Presently they cover half the globe but would form a reasonably sized polar ice cap if Wegener’s theory was true and the globe was reconstructed in his image of how it used to be. Despite Wegener having no concrete proof as to why this was the case his theory was proved to be accurate, physicists had believed that the earths crust was far from strong enough to be able to force itself apart.
RUNNING HEAD: CONTINENTAL DRIFT DISCUSSION Class Instructor Student The theory of Continental Drift was first hypothesized by Alfred Wegener, a meteorologist and geologist from Germany, was officially disclosed in 1912. Born in Berlin, in the 1880s he was not credited with the discovery until after his death. It was assumed that Continental Drift was impossible because there was no hard evidence to explain how the continents of the world could be separated. It would take a force of great magnitude to cause such an aggressive displacement of land mass. Wegener’s theory called Pangaea or “all earth” (Weil, 1997), proposed that the entire earth had at one time been one huge land mass.
'Volcanoes and seismic events are major pieces of evidence towards proving that plate tectonics theory is valid.' Discuss the extent to which you agree with this view (40 marks) The modern theory of plate tecctonics is a fairly new idea, developed in the last 100 years. It is now generally accepted as the explanation for seismic and volcanic activity. The theory, developed by Alfred Wegenger in 1912, states that the lithosphere is made up of seven large and several other smaller plates. He believed that all of the continents were once joined together, forming a super-continent called Pangaea.
Charles Lyell, a British geologist, reintroduced the idea of uniformitarianism when he published a series of books called Principles of Geology. Only then did people start to seriously consider that uniformitarianism was the way in which the earth was shaped. During the late 20th century, scientists began to challenge uniformitarianism. They believed that catastrophes do, at times, play a major part in shaping the Earth. Today we realize that neither uniformitarianism nor catastrophism completely explains what shapes the Earth.
These two articles really informed me on whats happening in the world due to global warming. Greenland ice core: Frozen in time was mainly explaining how they use frozen ice to find clues about the worlds past,present and future climate. One of the first things this article goes into is celestial Effects. Celestial effects is the alterations result in
The Arctic Small Tool Tradition, also known as Pre-Dorset, is a circumpolar cultural development which probably originated in Siberia. The oldest sites in North America appear suddenly on the west coast of Alaska about 4,000 years ago. Similarities to the Plano and Northwest micro blade traditions, as well as to Siberian Mesolithic blade technologies have caused considerable debate over origins (Irving 1962; Laughlin 1962, MacNeish 1964; Damas 1969). The technology bears no resemblance to the complexes which were previously present in the coastal regions of Alaska. The warming trend which was still evident at this time may have assisted in the rapid movement of people across the High Arctic.
1. This quote describes the history of America as nonexistent until the Europeans began to colonize it. The quote completely disregards the histories of hundreds of native tribes occupying the North, Central and South Americas. It describes how human beings had been developing civilizations for thousands of years in other parts of the world, while the Americas were void of any civilizations or people. It is saying that the history of the Americas began when the developed societies came and created new civilizations through out the continents.
SUMMARY TOPICS (1) ~TWO THEORIE~ [pic][pic] Scientist thinks that the first Americans migrated or moved from Asia. Some ancient people may have crossed a land bridge that joined Asia and North America during the last ice age. Ancient people may have crossed a land bridge that joined Asia and North America during the last ice age. The ice age was extremely Cold.A Bridge of land now called Beringia appeared where the Bering Strait is now. Scientist who told this theory believes the earliest American arrived 12,000 years ago.