On Growth and Form (1917) was D'Arcy Wentworth Thompson's pioneering effort to explore the mathematical principles that underlie biological form. He studied the similarity between the shapes of a jellyfish and a drop of ink, a splash and a hydroid, between dragonfly wings and bubble froth, the growth of radiolaria and snowflakes, the spirals of nautilus and mollusk shells and sheep horns. More recently, Adrian Bejan's Constructal Theory aims to explain all biological shape from one thermodynamic principle. This month there is an interview with Bejan for the layman. [more inside]
posted by twoleftfeet on Nov 13, 2008 - 16 comments

Counting in groups of 12 the first performer claps on 1,2,3,5,6,8,10 and 11. The second performer starts by clapping the same pattern but gradually shifts the pattern one step to the right. You are playing Steve Reich's clapping music. If you are serious you will want to study the score - and perhaps a watch a performance). If you are happen to be Evelyn Glennie you can have a go at both parts at once. - those slightly less more mortal are likely to end up like this. [more inside]
posted by rongorongo on Jan 14, 2008 - 25 comments

How the new type standard for American road signage reduces halation and improves readability.
posted by Blazecock Pileon on Aug 11, 2007 - 47 comments

Douglas Hofstadter says, "What troubles me is the notion that things that touch me at my deepest core -- pieces of music most of all, which I have always taken as direct soul-to-soul messages -- might be effectively produced by mechanisms thousands if not millions of times simpler than the intricate biological machinery that gives rise to a human soul.". That was prompted by his reception to the output of David Cope's project Experiments in Musical Intelligence.
posted by Gyan on Apr 11, 2006 - 22 comments

IslamicArchitecture.org : Islamic architecture, Islamic patterns and Islamic calligraphy.
posted by obedo on Sep 5, 2004 - 8 comments

Remember how some of us joked that the mailbox bomber was placing his bombs in a smiley face pattern? Well, we were right.
posted by Reggie452 on May 9, 2002 - 9 comments