Voice is going 'nuts' today but what for? Whizz is rather baffled but eventually understands that she has cracked the first 'megaclue' of the Earth Search. Voice beams up the three solutions on to the Dataview and when Whizz sees the three pictures she describes them with one word, but what is it? Bug bumps into one of Voice's 'bots' who seems to know the way round Bug's teaser but does Whizz know the way and do you? The latest clue in the Earth Search is 'These rings also hum', but what are they and how many of them are there?