Superman from one angle, Batman from another. Can't we all get along? Made using Mathematica; inspired by a blog post by Michael Trott @ Wolfram (http://blog.wolframalpha.com/2013/07/18/even-more-formulas-for-everything-from-filled-algebraic-curves-to-the-twitter-bird-the-american-flag-chocolate-easter-bunnies-and-the-superman-solid/).