The atom can't be seen, yet its existence can be proved. And it is simple to prove that it can't ever be seen. It has to be studied by indirect evidence - and the technical difficulty has been compared to asking a man who has never seen a piano to describe a piano from the sound it would make falling downstairs in the dark.
Carl David AndersonInformation of fundamental importance to the general problem of atomic structure has resulted from systematic studies of the cosmic radiation carried out by the Wilson cloud-chamber method.
Carl David AndersonThe ideal student would be one who was not working for grades but was working because he was interested in the work and not trying to compete with fellow students.
Carl David Anderson