Euclidean geometry. Parabolic geometry. Hyperbolic geometry. Projective geometry. Differential geometry. Calculus: Limits, continuity, differentiation, integration. Physical chemistry. Organic chemistry. Biochemistry. Classical mechanics. The indeterminacy principle. The wave equation. The Parthenon. The Anabasis. Air conditioning. Number theory. Romanesque architecture. Gothic architecture. Information theory. Entropy. Enthalpy. Every symphony ever written. Pierre Auguste Renoir. The twelve-tone scale. The mathematics behind it, twelfth root of two and all that. S-p hybrid bonding orbitals. The Bohr-Sommerfeld atom. The purine-pyrimidine structure of the DNA ladder. Single-sideband radio. All other radio. Dentistry. The internal-combustion engine. Turbojets. Turbofans. Doppler beam-sharpening. Penicillin. Airplanes. Surgery. The mammogram. The Pill. The condom. Polio vaccine. The integrated circuit. The computer. Football. Computational fluid dynamics. Tensors. The Constitution. Euripides, Sophocles, Aristophanes, Aeschylus, Homer, Hesiod. Glass. Rubber. Nylon. Roads. Buildings. Elvis. Acetylcholinesterase inhibitors. (OK, that’s nerve gas, and maybe we didn’t really need it.) Silicone. The automobile. Really weird stuff, like clathrates, Buckyballs, and rotaxanes. The Bible. Bug spray. Diffie-Hellman, public-key cryptography, and RSA. Et cetera.