4 a.m. is a particularly dark time of the morning – I remember hearing someone described warmly as an “Hour of the Wolf friend” – someone you could ring at 4 am, when the worries of the world came thudding into your brain, all at once – and they would take your call and listen.

The poet Rives made a TEDtalk on the subject of 4 a.m., got more feedback and made this further talk: “The Museum of 4 a.m.”   It’s a tale well told and worth watching til the end. (Time taken: 14 minutes).