Those of us who grew up coloring remember the cardinal rule: stay inside the lines. But those who pick up the Patterns of the Universe coloring book have to stay in the sines (and cosines and tangents ...

This work not only enjoys coloring, but also has an aspect as a collection of coloring techniques aimed at 'giving life to the painting.' The base of the coloring book is 5 types of Amabie including ...

For over 40 years, Venezuelan architect Rafael Araujo has been drawing the most beautiful illustrations of nature, entirely by hand. At an old drafting table he adeptly renders the mathematical ...