From Philip Le Riche, Harpenden, Hertfordshire, UK
The more we learn about the universe, the more we realise how much more there is to discover. This seemed to me to be amply demonstrated by your item “A cosmos made of string”. All we need is for the string theorists to come up with a new force they can dub “sealing wax” and we can have a cosmos made of string and sealing wax, which might be as close as we will ever get to a grand unified theory of everything (7 March, p 36).
