61.   In centuries past, navigators used the stars and magnetized needles dangling from strings to find their way.

62.   In centuries past, wars and social upheavals caused many books to come on the market.

63.   In centuries past, doctors used placebos to placate problem patients.

64.   In centuries past, you could avoid art.

65.   In general, this past century has brought us more fun and less drudgery.

66.   In only four years the past century have as many storms formed this early in the hurricane season.

67.   In past centuries, hijras were the esteemed special guardians of royal harems.

68.   In the poor south, driving into the mountains is like traveling to a past century.

69.   In the past century, banks and brokerages have come and gone, and proud names have risen and been erased.

70.   Indeed, the very notion of race as biological category seems to be part of a past century, a fact that some artists have been addressing for years.