Science & Technology

The Man Who Invented Pi

In 1706 a little-known mathematics teacher named William Jones first used a symbol to represent the platonic concept of pi, an ideal that in numerical terms can be approached, but never reached.

Elizabeth Tollet and her Scientific Sisters

Patricia Fara recounts the moving story of a gifted contemporary of Isaac Newton who came to symbolise the frustrations of generations of female scientists denied the chance to fulfil their talents.