Brilliant pebbles, literally...
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Saw the article, immediately had to think of The Daily WTF:
http://www.takepart.com/article/2013/10/30/starpath-glow-in-the-dark-roads-provide-energy-free-illumination
Saw the article, immediately had to think of The Daily WTF:
http://www.takepart.com/article/2013/10/30/starpath-glow-in-the-dark-roads-provide-energy-free-illumination