Home advantage is the psychological and physiological advantage that the home team has over the visiting team and it is prevalent in all sports, including soccer. There is no singular explanation for home advantage because it is comprised of and caused by many different components.
At one time, apple varieties numbered in the thousands, with each strain carrying a unique genetic code. Since the commercialization of apples, the United States has watched that number dwindle into a few choices.
Though the modern world views alchemy as little more than witchcraft and an inherent hindrance to progress, in reality alchemy may have been a precursor to modern chemistry. Alchemy has had an influence on a vast range of scientific discoveries.