All blue-eyed people probably share a single, common ancestor, who had a genetic mutation between 10,000 and 6,000 years ago.
The Italian regions of Toscana and Umbria are special. The people there are genetically different from the other Italian regions because of Etruscan genetic heritage in this area.
Scientists believe that our longing for sweets is a biological preference that may have been designed to ensure our survival. The liking for sweet tastes in our ancient evolution may have ensured the acceptance of sweet-tasting foods, such as breast milk and vitamin-rich fruits. Moreover, recent research suggests that we crave sweets for their pain-reducing properties.