Cerebro is a super-device used by the mutant Dr Charles Xavier, which first appeared in Marvel Comics’ X-Men #7. In a context where mutants were to be feared, marginalised and ostracised from society, it was uncommon for them to reveal themselves as what they were, unless they were forced to do so because of physical mutations that gave them away. With many mutants changing their birth names and creating aliases that represented their particular mutations, privacy and anonymity were their allies. Created by Charles and Magneto, Cerebro’s function was – to state it in a few words – to track down mutants.