U.S. Geography

What Nebraska county is the origin of the world's largest "Wooly Mammoth" elephant fossil?

More Questions from U.S. Geography
What U.S. state is 16th in land area and is bordered by six other states?
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Which company has its world headquarters in Oregon?
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Who was the first explorer to reach Kansas in 1541 while looking for gold?
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Which state is known as the "Keystone State" and includes Pittsburgh?
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Which of these rivers is located in the U.S.?
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What is the name of the famous gambling city in Nevada?
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What Mississippi college was founded in 1873 by Confederate General Mark P. Lowrey?
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Which Spanish explorer visited the area that is now Tennessee in 1540?
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