In 1700, the earth's total volume of printed material equalled 60 stacks of books each as high as Mt. Everest; currently the total volume of printed material equals 90 stacks of books extending to the distance of the sun.
Thursday, March 22, 2012
printing press
In 1700, the earth's total volume of printed material equalled 60 stacks of books each as high as Mt. Everest; currently the total volume of printed material equals 90 stacks of books extending to the distance of the sun.
