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Oceanic Deposits
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Description
- Scientists extract deep cores of material that have been deposited over long periods, with more recent material constantly burying older material.

- Cores include the bones and shells of plankton and other animal life.

- The information contained in the oxygen in the calcium carbonate is most important for determining past climates.
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What percentage of nature vs. nurture dictates human intelligence?
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75% Nature; 25% Nurture
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