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| Ohio State University geologists William Ausich (left), professor of earth sciences, and Christina O'Malley, a doctoral student, and their colleagues isolated the oldest complex organic compounds found in a fossil. They found the compounds in 350-million-year-old fossils of sea creatures known as crinoids; here, O'Malley holds a modern crinoid. Photo by Kevin Fitzsimons, courtesy of Ohio State University. |
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| Fossils of sea creatures known as crinoids, which lived 350 million years ago. Photo by Kevin Fitzsimons, courtesy of Ohio State University. |