(and yes, I know I'm posting a Math Monday on a Tuesday. Live with it.)
Mathematical Coffee Table
via Make: Online by Gareth Branwyn on 4/11/11
By George Hart for the Museum of Mathematics
Michael Serra, inspired by the work of Piet Hein.
The base consists of six pieces from a set of Hein's SOMA puzzle, so the remaining two pieces are available as end tables. The glass top is a superellipse, a shape which Hein used for many design purposes, because it interpolates between a circle and a square.
See all of George Hart's Math Monday columns