Christopher Prior is an Addison-Wheeler fellow in the Mathematical sciences department at Durham University. His general interests lie in mathematical modelling and the mathematical issues on the borderline between geometry and topology. He has a particular interest in physical systems for which the conservation of topology of inter-twined bundles or tubular structures is a key consideration. Prior and colleagues have come up with a new way to measure the entanglement of the magnetic field of the Sun. These twisted magnetic fields rise to the convection zone of the Sun and cause solar flares.