Small science: view from developing nations.

A 36× enlarged triply periodic porous cube of photocured polymer, 60 millimeters in total length, shown refl ected off a pool of uncured resin. Computer-aided design makes it possible to tailor materials with control over porosity, pore size, and mechanical properties. These materials may subsequently fi nd use as scaffolds for tissue engineering and cell-laden hydrogel constructs. See the special section starting on page 899 for a series of articles on biomaterials.