I can go down to the local grocery store and buy aluminum foil for roughly 40 cents per square foot — and NASA’s complaining about their budget? Why would the national space agency have to opt for make their foil out of gold rather than reliable old aluminum, or copper, or even silver if they’ve got to get fancy about it? I mean what’s next, a space suit made of carbon fiber? The fact is that NASA cuts corners wherever it can, but when soaring beyond the Earth’s skies there’s precious few areas that can tolerate less than the best. While most people think of gold only as a precious metal and as a building material embraced by people with more money than sense, it is also one of the heaviest, most uniquely workable metals that isn’t dangerously radioactive. The answer at Geek.com.
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