Millions of travelers visit the Grand Canyon each year, but just 150 years ago, this was still considered the "last blank spot on the map." One man, a one-armed civil war veteran, was determined to navigate and document the Colorado River as it winds through the canyon. Therefore, on May 24, 1869, John Wesley Powell […]
Ancient Indian pictographs (rock paintings) and petroglyphs (symbols carved or pecked on rocks) are claimed by some to be forms of writing for which meanings are known. However, are such claims supported by archaeology or by Native Americans themselves? Mr. Dart illustrates southwestern petroglyphs and pictographs, and discusses how even the same rock art symbol […]
Taking the events from Billy the Kid, who killed his first man in Arizona, the Gunfight at the OK Corral, and the arrest and trial of Ernesto Miranda, this presentation will explore how these seminal events became watershed experiences for the American legal system, and still impact the lives of individuals living in the United […]
Arizona played a key role in preparing to send humans to the moon in the late 1960s/early 1970s. The Apollo astronauts themselves traveled to the Grand Canyon and volcanic fields around the state to learn geology and practice their lunar excursions. Meanwhile, U.S. Geological Survey engineers worked with NASA staff members to develop and test […]
Global warming presents humanity with one of the most difficult ethical challenges ever faced. More than just a scientific problem this is a collective action problem requiring that we work together to find appropriate strategies for adaptation. It requires recognizing attribution of cause and effect and careful consideration of the likely outcomes of harm to […]