The Gömböc is a mathematical shape first theorised in 1996 and proven in 2006 by Hungarian scientists Péter Várkonyi and Gábor Domokos. It is a three-dimensional shape which is mono-monostatic, convex, and homogeneous i.e., with equal density throughout. It is characterized by its properties of balance in that it has two equilibria, one stable and one unstable.