What Were Reading Stones?

historical-nonfiction:

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Little round rocks of clear, polished glass, reading stones magnified anything underneath them. They were intended to help people with poor eyesight to read. Reading stone were invented in the 800s CE by Arab poet, and of course inventor, Abbas Ibn Firnas.

newyorker:

Before there was Google Earth, there were pigeons who photographed the earth from above. Read more about the birds who were outfitted with cameras, and see the photos that they took.