The deep time perspective that archaeology, geology, and related disciplines provide about natural hazards, environmental change, and societal development is often ignored when societies today make decisions affecting social sustainability and human safety. Studies of ancient peoples and natural events can help modern society deal with problems of environmental and social change, overpopulation, and sustainability. […]

Communication and secrecy were key to the successful operation of the Underground Railroad. Safety was more important than quickness. Both fugitive slaves and members of the Underground Railroad learned to code and decode hidden messages, and to disguise signs to avoid capture. There were code names for towns on the routes and code numbers for […]