The Clock of Life is a concept by Bertrand Planes that is marked in seven to eighty-four, with a mechanism slowed down 61,320 times. Each number represents one year, and a complete rotation takes place every 84 years (12x7=84). This was the maximum average life expectancy in Europe in 2006. And these studies have been done on the hormonal process of the hypothalamus and the natural lifespan.