Getty Images(Credit: Getty Images)A pioneering new treatment promises to tackle a wider range of cancers, with fewer side-effects than conventional radiotherapy. It also takes less than a second.In a series of vast underground caverns on the outskirts of Geneva, Switzerland, experiments are taking place which may one day lead to new generation of radiotherapy machines. The hope is that these devices could make it possible to cure complex brain tumours, eliminate cancers that have metastasised to...