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Visible Human Project.
For centuries, the study and findings of anatomy have traditionally been recorded in anatomical atlases - books of two dimensional pictures representing three-dimensional structures. The early atlases contained idealized illustrations of anatomical features to give the viewer some sense of their three-dimensionality. The Visible Human Project of the U.S. National Library of Medicine (NLM) was designed to provide the sample-based data needed to reproduce in three dimensions any part of human anatomy down to 1 mm detail.