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On a stage in front of an audience of thousands, a futuristic-looking machine squirted gel from a nozzle. Layer by layer, it built up the material, shaping it into a curved, pink, kidney-shape ...

On March 9, the National Park Service (NPS) reported fresh grizzly paw prints in the snow in the northern section of Yellowstone National Park. Then, on March 13, a trail camera set up by ...