Final answer:
The persistent myth about the zodiac is that it determines personality traits accurately.
Step-by-step explanation:
One persistent myth about the zodiac that still exists in our society is the belief that the zodiac determines personality traits accurately. Many people think that their zodiac sign can accurately predict their personality and behavior. However, scientific studies have shown that there is no evidence to support this claim. While astrology may be entertaining, it is not a scientifically valid method for determining personality traits.