Mathematical formulae may appear dry and inaccessible, but to a mathematician an equation can embody the quintescence of beauty. The beauty of a formula may result from simplicity, symmetry, elegance or the expression of an immutable truth. Professor Semir Zeki found that, as with the experience of visual or musical beauty, the activity in the brain is strongly related to how intense people declare their experience of beauty to be—even in this example where the source of beauty is extremely abstract.Read more.