51.   As my epidemiologist friends point out to me, when two things correlate, there are always three possible explanations.

52.   As the psychiatrist seeks possible explanations, he meets a female astronomer, who takes him on a journey into time, space and understanding.

53.   At his locker, Rusty offered one possible explanation.

54.   Bambach and his associates propose several possible explanations for a catastrophic carbon dioxide upwelling.

55.   Besides, if Cunanan had lived, what possible explanation could he have served up that would have satisfied any of us?

56.   Bernstein offered several possible explanations for the rise in younger theatergoers.

57.   Beyond that are several possible explanations, he said.

58.   A look at possible explanations.

59.   A look at possible explanations for locker-room theft in baseball and other pro sports.

60.   A possible explanation for all this arrived in an otherwise harmless issue of British Vogue.