In Diamonds? Flaws, Clues to Earth?s Carbon Cycle

[unable to retrieve full-text content]Gemstones that once lay more than 435 miles beneath the earth?s surface and that include chemical signatures of the extinct ocean floor are shedding light on the planet?s carbon cycle.

Source: http://feeds.nytimes.com/click.phdo?i=676d304d9d3bc183341c43a00f64acb7

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