Small sized stones should use small diameter wire, large size stones should use large diameter wire * In the video I use : 20 gauge ( wire diameter 0.8mm ) : 30cm( 12 inch) 26 gauge ( wire diameter 0.
Scientists have developed a lens-free mid-infrared camera using a modern twist on pinhole imaging. The system uses nonlinear crystals to convert infrared light into visible, allowing standard sensors ...
The Discovery Center Museum in Rockford is teaching visitors how to make a sundial, an ancient tool used to tell time using the sun.
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