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Green, Blue, and Black
Ski Areas have a smart way to tell skiers the type of terrain they may be facing. Even the Ski Area map shows the runs by these three colors and…
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Spring Cleaning
Image by anncapictures from Pixabay "I will restore your leaders ..."
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The Light that Saves
The Fresnel lens was pioneered by Augustin-Jean Fresnel in 1822. It was essentially a light magnifier. It uses the principle of bending light through a lens with “… concentric rings...
