It was on the first of November 2012, nearly 10 years ago, when Margaret McCollum was on her regular journey home via the London Underground subway system. As usual, she stopped at embankment station. Standing on the platform, she was listening for something very specific. It didn’t come. She was shocked and later described the moment as being “horrifying and completely, utterly devastating.”
What about not hearing a particular sound had been so distressing?
