Spacetime Light Cones

I’m Katharine Downey, a student at George Mason University taking Math 401: Mathematics Through 3D Printing in the Fall 2019 semester. This object is my print from a project in the class where symmetry and/or linear or non-linear transformations were to be displayed. The object, displaying symmetry, may at first appear as two hollow cones, but they are in fact a 3D illustration of a concept in Minkowski spacetime known commonly as light cones. It illustrates the three dimensions of space and the