A little tweeting birdie pointed me to the website of one Carlton Hibbert, a U.K.-based illustrator and designer. Carlton has taken to posting intricate patterned images for download and coloring. The ...

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 ...

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 ...

Adult coloring books aren't just nostalgic throwbacks: they're methods of artistic expression that can help improve brain function, motor skills, and focus. They can also help people relieve stress by ...