There’s nothing like standing under a dark, star-spangled night sky to quiet the mind and reduce stress, share an experience of awe with family and friends, and to inspire creative thoughts. Yet such dark skies are a disappearing resource, with only 20% of the world living in a place where the center of our Milky […]

Tulsa, Oklahoma’s Greenwood district was coined “Black Wall Street” because it was a thriving African American community that boosted hospitals, churches, shopping centers, schools, and banks. But all that changed, on May 31, 1921, when an angry mob stormed the town and burned everything to the ground. This presentation will explore what made Black Wall […]

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 […]

This presentation covers humankind’s water use and food supply interactions with Arizona’s ecology from Clovis culture hunter-gatherers to prehistoric irrigation canals, contemporary Hopi and Tohono O’odham dry farming, and present-day American farmers. We will examine how overhunting and climate change affected the wooly mammoth populations and the agriculture experiments that followed. From early attempts to […]

This presentation examines the remarkable living structures built by the people who first lived in the canyons of the Sierra Ancha wilderness during the early Middle Ages. The architectural dwellings reflect the culture and history of these people and help us understand their contributions to life in the Arizona desert. The presentation includes numerous photos […]

The boundary that separates Arizona from Mexico extends 354 miles across land and 24 miles up the Colorado River. Arizona shares this boundary with two Mexican states and two Native American Reservations. Eight ports-of-entry and six sets of border town pairs create important points of contact. Efforts to conserve land, manage urban growth, create resilient […]

Entrepreneurs offering assorted “get rich quick” schemes and “cure-alls” have visited Arizona since the early days. Benefitting from tales of abundant resources in the territory, limited law enforcement and communication, a scoundrel could create enticing promises of wealth and health without much external oversight. Newspapers often fanned the hysteria only to later denounce and expose […]

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. […]