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Science Museum Group Journal is an online open access journal....Â
Alison Laurence (2019)
A discourse with deep time: the extinct animals of Crystal Palace Park as heritage artefacts.
Science Museum Group Journal 11: 10.15180; 191102Â
When the Crystal Palace at Sydenham opened in 1854, the extinct animal models and geological strata exhibited in its park grounds offered Victorians access to a reconstructed past -- modelled there for the first time -- and drastically transformed how they understood and engaged with the history of the Earth. The geological section, developed by British naturalists and modelled after and with local resources was, like the rest of the Crystal Palace, governed by a historical perspective meant to communicate the glory of Victorian Britain. The guidebook authored by Richard Owen, Geology and Inhabitants of the Ancient World, illustrates how Victorian naturalists placed nature in the service of the nation -- even if those elements of nature, like the Iguanodon or the Megalosaurus, lived and died long before such human categories were established. The geological section of the Crystal Palace at Sydenham, which educated the public about the past while celebrating the scale and might of modernity, was a discursive site of exchange between past and present, but one that favoured the human present by intimating that deep time had been domesticated, corralled and commoditised by the nationâs naturalists. Initially, the claim that extinct animals were aligned with British national heritage was a construction that matched the agenda of the Crystal Palace Company. Over time, the extinct animal models themselves (rather than the animals they represented) became historical artefacts recognised as heritage assets.
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ÂJ. E. Peterson and M. L. Krippner (2019)
Comparisons of fidelity in the digitization and 3D printing of vertebrate fossils.
Journal of Paleontological Techniques 22: 1-9
Â3D surface digitization and 3D printing have increased in vertebrate paleontological research, teaching, and outreach as resolution increases and startup costs decrease. While the lowered cost and increased options for entry-level commercial printing and digitization units have led to their implementation in many research laboratories and classrooms, the question of fidelity and accuracy for their use as research and teaching aides has not been fully investigated. This study explores the quality of digitization and resolution of 3D printed specimens in quantitative terms to determine whether entry-level digitization and 3D printing units are feasible for the needs of most vertebrate paleontologists and educators. In order to test the fidelity of these techniques, resin casts of a Tyrannosaurus rex tooth and crocodilian osteoderm were digitized using two different techniques: white-light structured scanning and laser-texture scanning. Each resulting stereolithographic digital model was compared and statistically tested (p < 0.05) for significant differences in morphology based on point cloud volume and average triangle surfaces. Furthermore, the resulting digital models were printed on two commercial-grade fused deposition modeling printers. The resulting printed models were also compared and statistically tested (p < 0.05) for significant differences in shape and morphology. The results of this study suggest that while differences in digitization methods and 3D printed models do exist, they are virtually indistinguishable. However, observed differences were exacerbated by morphological variations of the original object; flat-shaped to tabular objects showed the greatest variability among digitization techniques. As such, even low-cost digitization and 3D printing systems are suitable for many paleontological research initiatives as well as the reproduction of high-quality teaching specimens.