Contact Us Fossils One of the often-repeated https://findpeopleworld.pro/6tag/5454.php about the Lewis and Clark expedition is that on their Voyage of Discovery they expected they might see dinosaurs or prehistoric creatures still living in the wild American West.
This statement is not correct for several reasons. First and foremost, in dinosaur remains had not yet been discovered and identified as such anywhere in the world.
Put another way, people ineven Thomas Jefferson and the foremost scientists of the day, knew nothing about dinosaurs. The notions of prehistoric creatures and extinction were so new that President Jefferson and Meriwether Lewis cannot really be considered naive for thinking that mammoths or mastodons which had been discovered might still exist in the West. For Jefferson and Lewis, datings of fossils kit ohio were not necessarily "prehistoric creatures.
The term "dinosaur" wasn't even coined untiland the idea of extinct reptilian lifeforms was quite radical even then, forty years after Lewis and Clark's expedition.
Charles Darwin, natural selection, evolution, patterns of extinction, and the geological dating of fossil remains were all far in the future in At the dating of fossils kit ohio of Lewis and Clark in the early s, scientists and philosophers were just beginning to discover the fossilized remains of animals previously unknown to science.
We know today that most of these animals were not dinosaurs but extinct species of mammals such as mastodons, sloths and mammoths.
Whatever their classification, they presented a startling new conundrum for scientists, who, at the beginning of the 19th century, were influenced as much by religion as by science. How long ago had these creatures lived, that their remains had become fossilized and been buried under many layers of sediment? Most Europeans and Americans in the early 19th century believed that the earth was created just a little over 5, years earlier.
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This was the result of Irish Archbishop James Ussher's calculation of the age of the earth. Using the Bible as his guide, Ussher went back through the generations described in the Bible and pinpointed exactly when Adam and Eve dating of fossils kit ohio created by God.
His conclusion was that the world was created on Sunday, October 23, B. Of course, Ussher was still taking the description of a year in the Bible to mean literally a year as it was defined in the modern era. Geologically, then, it was thought that the earth was quite young, which left questions about how the datings of fossils kit ohio of large creatures like the mammoth could have become fossilized so quickly.
Notions about the age of the earth were changing near the turn of the 19th century, however, with the publication of the theories of James Hutton, a Scotsman who has been called "the Father of Geology.
The other major notion of the early 19th century which made fossil finds difficult to reconcile was the concept of extinction. Why would God create a creature or a species and then let all of them die off? Init was thought by most Europeans and Americans that all species were saved by Noah on his Ark.
The idea of extinction, then, seemed to go against what was written in the Bible. Cuvier began his work at the Jardin des Plantes in Paris, France's museum of natural history, in Cuvier initiated the science of "comparative anatomy," looking at the bones of animals and identifying the functions of each, comparing them with similar creatures.
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InCuvier was just developing his notion that, from his study of fossil remains, some of God's creatures had in dating of fossils kit ohio become extinct. In other words, at the time of Lewis and Clark, the search for fossil remains had just begun, and few people believed in the possibility of extinction.
Every story has a little grain of truth to it, however, and the story of Lewis and Clark looking "for dinosaurs" is no exception.
ByThomas Jefferson, Charles Willson Peale, Caspar Wistar and other scientific Americans had excavated the datings of fossils kit ohio of mammoths, which they called the "great incognitum," and "a large lion-like creature" Jefferson called Megalonyx later identified as a giant ground sloth in New Jersey and Virginia. They believed that these animals might still be living further to the West.
Because if no creatures ever created by God had become extinct, then every creature, even those for which fossilized remains were found, still existed somewhere on earth. Jefferson differed from most men of his time in that he believed that extinction might be possible, although the chance that mammoths still lived in the West was also very real to him.
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Jefferson added that there were "symptoms of it's late and present existence. The route we are exploring will perhaps bring us further evidence of it. In his tangle with the Comte de Buffon.
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