Anti-nuclear activists point to recurring accidents at nuclear power plants.
What centers the memories is the issue of survival despite recurring accidents and threats to sustained faith in a world dominated by relentless harm or loss, to artistic practice in a world that seldom rewards it, and to family continuity as generations scatter.
These recurring accidents show that the existing knowledge has not been used effectively.
'Too late,' I wrote back, 'I'm playing Ardu.' It's no accident, the recurring verb.
In redesigning the Soyuz to prevent such an accident from recurring, one seat had to be omitted to accommodate a life-support system for two pressure-suited cosmonauts.
It is no accident that recurring characters like Stone turn up at this time of year: beach books benefit from seeming cozily familiar.
The fact that sexual assault is a recurring theme is no accident.
And, as the title suggests, health, or the lack of it, is a recurring preoccupation: bereavement, cancer, accidents, Alzheimer's - even, glancingly, the war in Iraq, are the prevailing subjects; and the characters are now between 45 and 56, "the riskiest decade for tumours".
Ferry accidents are a recurring problem in the border region, though the majority of fatal accidents have occurred on the Bangladeshi side.
It's no accident that one recurring feature of the show, a joke of the day, is delivered via portholes reminiscent of the "Rowan & Martin's Laugh-In" wall.
