## Articles

**Nicholas Mee**discovers, that would be far too simple. In fact, the length of a day varies throughout the year. If you plot the position of the Sun in the sky at the same time every day, you get a strange figure of eight which has provided one artist with a source for inspiration.

**Liz Newton**takes you on a journey of origami, maths and science.

**Burkard Polster**and

**Marty Ross**explain why, and explore the maths behind bell ringing.

**Burkard Polster**explains how to get to grips with the bewildering range of juggling possibilities and invites you to do your own virtual juggling.

**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?

**Josefina Alvarez**and

**Cesar L. Garcia**investigate.

**Ben Evans**explains how maths is used to build this car.