Trilobites are on display at the American Museum of Natural History, Thursday, June 13, 2013 in New York. The temporary exhibition includes 15 fossils of various trilobite species from the Museum’s permanent collection, including specimens from New York, Morocco, and Russia. The fossils on display are hundreds of millions of years old—but they are so exquisitely preserved that the animals seem almost alive, crawling along the seafloor. (AP Photo/Mary Altaffer)

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