Armed with metal detectors, curious explorers are finding historical objects every day. For example, Bob Podhrasky, COO, senior vice president, and director of engineering at metal detector ...

From hobbyist gear to advanced scanners, the science behind detection depth is complex. Explore the variables that govern just how deep detectors can search.

For more stubborn rust or scale, mechanical methods may be necessary. Brass wire brushes, scrapers, or even rotary tools with ...