# Soap film

A

**soap film** is a natural

minimal surface form as opposed to the

mathematical minimal surface. The natural minimal surface form has

helical edges. The mathematical minimal surface form has

straight edges. This in turn means they have different

surface forms, since one surface extends between helical edges, and the other extends between straight edges. This fact was overlooked by

mathematicians for over 150 years because they used thin wire frames within which to suspend their soap-film surfaces, and so could not detect the helical edge of the soap-film.