In wet weather, garden snails can seek shelter in letterboxes – and find a feast there waiting for themWe’ve all heard of snail mail – a term popularised since the advent of electronic mail – but who knew that snails eat mail? It might sound far-fetched but it’s true.We have it on good authority from the ecologist Simon Mustoe, who said snails ate his letter from Sir David Attenborough, a BBC report announcing the cl