{"product_id":"firebird-spiral-1","title":"Firebird spiral","description":"\u003cp\u003eShells, storms and galaxies often take the form of an equiangular, or logarithmic, spiral. So does Romanesque broccoli, but I hate broccoli. This is a set of 11 spirals, each with the same origin but successively rotated by 20 degrees.\n\nIt's easy to describe this kind of spiral mathematically, not so easy in words. Perhaps the simplest way to say it is that if you were to draw a whole lot of straight lines radiating our from the origin, wherever the spiral crossed one of those lines it would be at the same angle to the line - strictly, its tangent would be at the same angle - hence 'equiangular'. The spiral has many fascinating qualities - so many that the famous mathematician Jacob Bernoulli nicknamed it 'miraculous spiral'. Among them is the fact that no matter how many turns you add, the overall shape never alters - just turn and shrink and you're back where you started. Then there is the fact that you can add an infinite number of turns going inwards but the distance from any point along the spiral to the origin is finite!\n\nExtra tags: maths, mathematics, spirals\u003c\/p\u003e","brand":"d\/dx art","offers":[{"title":"Default Title","offer_id":58790020088191,"sku":"v2-shell-6683","price":29.39,"currency_code":"GBP","in_stock":true}],"url":"https:\/\/myarthaus.com\/products\/firebird-spiral-1","provider":"Arthaus","version":"1.0","type":"link"}