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1637 Rene Descartes writes Discourse on the Method 

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1637 Rene Descartes writes Discourse on the Method 

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1905 Ernest Rutherford suggested using radioactivity to estimate the age of the earth.

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1905 Ernest Rutherford suggested using radioactivity to estimate the age of the earth.

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1862 Kelvin estimated the age of the earth was 98 million years. 

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1862 Kelvin estimated the age of the earth was 98 million years. 

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1956 Clair Patterson calculated that the earth was 4.5 billion years old.

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1956 Clair Patterson calculated that the earth was 4.5 billion years old.

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1658 Bishop Ussher stated that the earth was created in 4004 B.C.E.

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1658 Bishop Ussher stated that the earth was created in 4004 B.C.E.