Dear Dr Claire
Hi there. I'm Farrel's mother. He showed me your answer to his letter about a bionic ear and it made me think that I have a question that I've always been too embarrassed to ask--ever since I've been at school and must have missed some obvious science lesson or something.
(I mean, I'm the sort of person who never knew that flesh and meat were the same thing until recently--even though my husband once was a butcher! And Farrel has tried to explain to me that thunder is not caused by clouds banging together.) Anyway, I sort of know what an atom is but I'm not sure. I know they're tiny, but... Can you tell me, please?