The latest work by scientists in Britain is paving the way for bionic limbs controlled by the central nervous system. Early clinical trials on a small group of patients who had lost fingers or thumbs has been very encouraging. The next stage of trials will involve upper and lower limb replacements and probably benefit victims of last year’s London bombing attacks. The technology could be ready for thumb and forefingers in a few years, and larger limb replacements in five years. (BBC)