X-ray: NASA/CXC/Univ. of Wisconsin-Madison/S. Heinz et al. Read more in Light from the Void, which is available from Smithsonian Books. Visit Smithsonian Books’ website to learn more about ...

Scleractinian corals typically form a robust calcium carbonate skeleton beneath their living tissue. This skeleton, through its trace element composition and isotope ratios, may record environmental ...

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