<n>trace</n> (2002) by artist <n>Hideo Kobayashi</n>.

<n>Green Staircase #2</n> (2002) by <n>James Casebere</n>.

<n>White Body Fan</n>, a 1972 performance piece by artist <n>Rebecca Horn</n>.

<n>Flooded Archway</n> (1999) by artist <n>James Casebere</n>.

<n>Section of Wheat-Stem</n> by <n>Arthur E. Smith</n> from <n>Nature Through Microscope and Camera</n>, 1909.

Artist <n>Carl Andre</n> with his 1966 <n>Minimalist</n> sculpture, <n>Equivalent VIII</n>.

A kitchen design by <n>J O R G E K H A W A M</n> featuring <n>Avacatus</n> marble.

<n>Monochrome #1</n> (2008) by artist <n>James Casebere</n>.

<n>Structure of the optic tectum of the sparrow</n> (1898) by <n>Santiago Ramón y Cajal</n>.

A self-portrait by photographer <n>Francesca Woodman</n>.

The surface of <n>Mars</n>. Image from <n>NASA</n>, <n>JPL</n>, and the <n>University of Arizona</n>.

<n>The Art of Being Happy (3)</n>, a 2012 drawing by artist <n>Jorinde Voigt</n>.

Image of planetary topography. Photo via <n>JPL</n>.

Building facade in Hong Kong, photographed by <n>Michael Wolf</n>.

A photograph from the <n>Hong Kong Corner Houses</n> series by <n>Michael Wolf</n>, 2010.

<n>Circle</n>, an etching from 1981 by Ukrainian artist <n>Alexander Aksinin</n>.

<n>Laputa I</n> (1977), an etching by artist <n>Alexander Aksinin</n>.

A photograph by <n>Michael Wolf</n> from his series <n>Hong Kong Flora</n>.