Consider these weird universes and ways in which the stick man can shoot the robot in the back.

This article (the first of two) contains ideas for investigations. Space-time, the curvature of space and topology are introduced with some fascinating problems to explore.

How many different colours would be needed to colour these different patterns on a torus?

Some simple ideas about graph theory with a discussion of a proof of Euler's formula relating the numbers of vertces, edges and faces of a graph.

How can you represent the curvature of a cylinder on a flat piece of paper?

Put your visualisation skills to the test by seeing which of these molecules can be rotated onto each other.

Can you make a new type of fair die with 14 faces by shaving the corners off a cube?

Can you visualise whether these nets fold up into 3D shapes? Watch the videos each time to see if you were correct.

This is the first article in a series which aim to provide some insight into the way spatial thinking develops in children, and draw on a range of reported research. The focus of this article is the. . . .

The second in a series of articles on visualising and modelling shapes in the history of astronomy.

A cube is made from smaller cubes, 5 by 5 by 5, then some of those cubes are removed. Can you make the specified shapes, and what is the most and least number of cubes required ?

This article explores ths history of theories about the shape of our planet. It is the first in a series of articles looking at the significance of geometric shapes in the history of astronomy.

You have 27 small cubes, 3 each of nine colours. Use the small cubes to make a 3 by 3 by 3 cube so that each face of the bigger cube contains one of every colour.