A recently discovered set of drawings by Nikola Tesla reveals an incredible multiplication "map" that contains all numbers in a simple system. The sketches were hidden in a small trunk with drawings and manuscripts for
My dream! "The Spiral Cellars design/build firm will dig a hole in whatever room you want your cellar in and haul the dirt right out the front door. In the remaining void they infill a spiral-staircase wine cellar.
When we think of gas masks, we immediately envision goggles with a large contraption placed over the mouth. That’s because the design has largely gone unchanged over the years. Perhaps this cumbersome design is not the best solution.