Lattice

Lattices and lines, lattices and lines. It's all about the intersecting planes.

This post's theme word is ruck, "a crease or wrinkle." The Louvre's absence of rucks would come in handy during a particularly cold game of I-spy-with-my-little-eye in December... hint: starts with 'L', located by a physicist, included in the title of this post. You have 60 minutes to guess while fending off frostbite!