Japanese Marimo terrariums.

(Source: urbankoi)

Some old books have hidden messages on the edge of their pages.

didyouknowblog2:

image

image

image

image

This was done through a technique called “fore-edge painting,” which is an illustration that is hidden on the edge of the pages of the book. The technique allegedly dates back to the 1650s.

(Source: didyouknowblog.com)