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acrylic prints device acrylic prints european acrylic prints technological acrylic prints sem acrylic prints chemical acrylic prints instrument acrylic prints scientific acrylic prints science acrylic prints scanning electron micrograph acrylic prints fossil acrylic prints specimen acrylic prints sample acrylic prints analysis acrylic prints italian acrylic prints scanning electron microscope acrylic prints

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Scanning electron microscope. Researcher looking at a sample using a scanning electron microscope (SEM). An SEM uses an electron beam to obtain a three-dimensional image of an object. The beam is scanned over the sample in a vacuum, causing the emission of secondary electrons. These secondary electrons are detected and used to form the image. The sample here is material from a fossilised footprint found in rock on the Roccamoufina Volcano, near Naples, Italy. It is part of a set known locally as the 'Devil's tracks'. The footprints have been identified as human and dated to between 385,000 and 325,00 years ago. Photographed at the University of Naples, Italy.

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