Pretty stag, acorn, oak leaf, knotwork. Think i would like to make a bone skeleton bull with horns
Urnes style tutorial. Take a look at the other 3 tutorials for the general knotwork basics. see also: Mating urnes beasts, should I put on "Mature Content"?
optical illusion Mais
Cicada, Stages of Conventionalization by Hugo Froelich for Keramic Studio Magazine, 1905
the golden ratio
The golden ratio should not need any introduction to those who have studied math and design in school. Some designers apply these mathematical concepts to come up with more visually appealing works. This infographic from companyfolders.com covers a few golden ratio facts: