Here's a fossil whale .stl we sourced from the Smithsonian X 3D models catalog: http://3d.si.edu/browser It was optimized for desktop 3d printing through quadric edge decimation in order to drastically reduce mesh face count and file size. Printed for a presentation on 3d printing and STEM education. No copyright infringement intended. All source files belong to The Smithsonian Institution. Printed at 0.1mm layer height, 3 perimeters, 20% infill.