Lead: Historical study often helps reveal twists in the human journey. We examine history’s turning points: Consider the Black Death.

Intro: A Moment in Time with Dan Roberts.

Content: In early October 1347, a ship left the city of Caffa in Southern Russia, bound for the Sicilian port of Messina. Along with its cargo it played host to its usual compliment of migratory black rats. They in turn were infested with tiny fleas bearing the deadly bacillus, identified finally in 1800s as pasteurella pestis, the bubonic plague.