Editor’s note Local hockey historian and author Timothy Gassen is telling the story of Tucson hockey through the years. Next week: The Arizona Icecats transform into the Wildcats and face their most ...

Mining activity in the Painted Rocks Mountains, about 28 miles northwest of Gila Bend, became prevalent in the early 1900s. Rowley Mine, located about 800 feet up the west slope of a mountain within ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...