Below is everything (newest at top) with "education OR history OR measurements" in its title or subcategories. For a strict listing (matching all categories and subcats), click hereSOMETHING TO PONDERfrom 2010 in ( education / history / measurements )
Railroad tracks. The US standard railroad gauge (distance between the rails) is 4 feet, 8.5 inches. That's an exceedingly odd number. Why was that gauge used? Because that's the way they built them in England, and English expatriates designed the US railroads. Why did the English build them like that? Because the first rail lines were built... read more Amazon Movers & Shakers |
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