a question which is bugging me.... Yes, I know that parity is violated only by the Weak Interaction, which is very short range. So I would answer "no, there is no P violation on macroscopic scale" However, many macroscopic properties are the results of what happens on the microscopic level. So can P violation somehow "leak" into the macroscopic world? Or, If you insist on the answer "No", is there a solid proof that macroscopic world is P symmetric?