english: One ancient theory  was an idea called vitalism, which claimed  that living things were unique because they were filled  with a special substance, or energy, that was the essence of life.
non_english: Stara terorija je bila ideja pod imenom vitalizam, koji kaže da su žive stvari bile jedinstvene jer su bile ispunjene posebnim supstancama ili energijom, koja je bila suština života.