Something everyone learns in Physics lessons at school is that light is refracted and reflected at the interface between air and water.

A senior lecturer from the University of Sussex has contributed to a book of brainteasers from BBC Radio 4's Today Programme, which published yesterday.

String art is a technique for the creation of visual artwork where images emerge from a set of strings that are spanned between pins.

), and Matthew Hastings, a researcher at Microsoft, have solved one of the world's most challenging open problems in the field of mathematical physics.