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Stone Color Blind Everyone is familiar with red-green or yellow-blue color blindness. But have you ever heard of Stone Color Blindness? I think these days it must have fancy medical term  but so far I haven’t found it. But back in the day Stone Color Blind meant people could only see various shades of blue, … Continue reading »

Think it’s hot today? Hottest temperature on record in North America. 134 °F    Death Valley, California, USA     July 10, 1913