The Peloncillo mining district in the Black Hills has a solid history of producing pumice and scoria as well as being a unique site for collecting fire agates. The Black Hills are at the northern end ...

Abstract: The objective of this study was to investigate the influence of roughened surface features on the perceived hardness of various materials. Thirteen participants used a visual analog scale to ...

IN the past, several sets of measurements have been made of the variation of Brinell hardness number with grain size, notably on α-brass1, copper and bronze2, and ‘Armco’ iron3. The consistent ...

White noise includes all frequencies and can help with relaxation and masking sounds. Pink noise is softer with more power in lower frequencies and can be more pleasing and relaxing. Brown noise is ...

Have you ever looked at an Advent wreath and wondered why there are three different candle colors used on it? The three Advent candle colors, purple, pink, and white, have deep spiritual symbolism and ...

CODEPINK is a feminist grassroots organization working to end U.S. warfare and imperialism, support peace and human rights initiatives, and redirect resources into healthcare, education, green jobs ...

When the monsoon rains start coming, Verde Valley rockhounds come running. And from first rainfall, there is no time for games for rockhounds, or amateur geologists, when it comes to hunting for ...