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Hobart King
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Earth Science is the study of the Earth and its neighbors in space. It is an exciting science with many interesting and practical applications.

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Tiny amounts of rare earth metals are used in most small electronic devices. These devices have a short life-span and REE recycling is infrequently done. Billions are thrown away each year.

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How do Diamonds Form?
http://geology.com/articles/diamonds-from-coal/
Coal has rarely played a role in the formation of diamonds. In fact, most diamonds that have been dated are much older than Earth's first land plants - the source material of coal! That alone should be enough evidence to shut down the idea that Earth's diamond deposits were formed from coal.
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