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A geological 'orrery' could reveal planetary dynamics in deep time

from Scientific American

The Lamont-Doherty Earth Observatory comprises about a dozen small buildings nestled among pine trees in the Palisades, 15 miles north of Manhattan. On the second floor of the observatory’s geoscience building, the shelves lining Columbia University paleontologist Paul Olsen’s labyrinthine office sag under the weight of hundreds of books about dinosaurs. more

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