‘Toothpick Boss’ Jerry Hackett, 85, painstakingly builds replicas of iconic Minnesota structures
What started as windmills and bridges in 2018 has grown to ornate churches, sprawling schools and Jerry Hackett’s latest muse ...
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How chemistry and force etch mysterious spiral patterns on solid surfaces
Curiosity about a mistake that left tiny dots on a germanium wafer with evaporated metal films led to the discovery of beautiful spiral patterns etched on the surface of the semiconductor by a ...