Beauty is nothing tangible, it only exists in our heads as a pleasant feeling. If we'd have to define it, we perceive something as beautiful if its color, shape, form, or proportion are somehow appealing to us.

Beauty is a very human experience that has been with us for millions of years: it seems that early humans shaped their tools into teardrops only because they liked them better that way, for example.

Throughout history, the definition of beauty and beauty ideals have changed a lot. But there are some patterns that remained: the golden ratio, symmetry, or fractal patterns can be found in art and architecture from our beginning until today.

Beauty patterns that resisted in time come all from nature:

• Fractal patterns: snail shells, flower heads, waves, or clouds. Identifying the patterns and assessing was vital for our survival: Do these clouds mean rain will come? is this water safe to swim in?
• Symmetry: in nature, it means everything is as it should be. Because it is so common in nature, it is extremely familiar to our brain and it helped our ancestors identify danger.