Bigger, better and longer lasting - this week we go in search of the battery technology that will power the future as well as consider the shortcomings of our present technologies. We also try to tune-in to our own broadcast on a radio powered by moss! Plus, in the news, the genetic switch for spinal nerve regeneration, the ocean deep inside Enceladus, young-smoking dads condemn their sons to adult obesity and why cereals make eye contact with you...