Round Mars describe a tetrahedron; the sphere including this will be Jupiter.
"Kepler"
Walter W. Bryant
The wildest streaks of marestail clouds in the sky, or the most irregular heavenly nebulae, have surely just as much form as a geometrical tetrahedron; and as for "void," how can that be void which is full of matter?
"Mr. Gladstone and Genesis Essay #5 from "Science and Hebrew Tradition""
Thomas Henry Huxley
Its head was a pyramid, a tetrahedron; its length vanished in the further darkness.
"The Metal Monster"
A. Merritt