What most of us don't realize is that the past and the present are one. That time, as we know it; hours, days, weeks, years, are man-made divisions, and nowhere in the world is one more reminded of the long passage of man, than in the Roman catacombs. Fifty years after Christ, the first Christians were buried in those subterranean cemeteries, but don't let me get ahead of myself... Let Dr Laurence Cain tell the story.