3D Printing a neighborhood

This is an amazing prospect for low income housing, planning, engineering, and construction. Our minds are blown to be able to build a home with one 3D printer. http://www.businessinsider.com/3d-printed-houses-are-here-2014-9

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History of the Hydrant

Here is an interesting history, and FYI on fire hydrants. http://gizmodo.com/why-fire-hydrants-don-t-freeze-and-burst-during-winter-1619974872?amp&amp

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