Stock Photo - Paleontologists Frederik Spindler (C), Christen Shelton (R) and Nico Schendel (L) take a bone sample from the world's only fossil of a Pantelosaurus, a Saxony Pelycosaurus from the Permian age, in Freiberg, Germany, 06 May 2014. Thin slices of bone have been taken to research its growth under the microscope. Photo: MATTHIAS HIEKEL/dpa | usage worldwide. - Freiberg/Saxony/Germany

Stock Photo: Paleontologists Frederik Spindler (C), Christen Shelton (R) and Nico Schendel (L) take a bone sample from the world's only fossil of a Pantelosaurus.

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