## geometry

**Gábor Domokos**, one of their discoverers, reckons that in some sense they barely exists at all. So what are Gömböcs and what makes them special?

**Phil Dench**tells

*Plus*how he uses mathematics to help bring these models to life.

Cambridge celebrates 25 years since the first very early Universe workshop

*any*tilings based on fiveness?

**Craig Kaplan**takes us through the five-fold tiling problem and uncovers some interesting designs in the process.