A computer program that can learn languages

Mathematicians are testing a silicon chip that mimics the function of a part of the human brain concerned with memory. Is this some maths you'd rather not forget?

John Henstridge and Jodie Thompson tell Plus about life as consultant statisticians, modelling real-world problems in areas as diverse as the shipping industry and water rationing.

Numbers like Pi have no repeating pattern. So just how accurately do we know what it is?