Elementary Theorems Relating to the Geometry of a Space of Three Dimensions, and of Uniform Positive Curvature in the Fourth Dimension. By Simon Newcomb. (From the Journal fur Mathematik, Band ...

GCSE Maths Geometry and measure learning resources for adults, children, parents and teachers.

It is a mighty puzzle. How did NASA steal our DIY spaceflight blogger Kristian von Bengston's capsule idea 53 years ago? Read about his design (along with some kick-ass sketches) and how he ...