The third zodiac sign and the first dual one dual in nature, Gemini is the sign of communication. It symbolizes duality and similarity, but also two being one. The sign of Gemini is extremely contradictory, even controversial. It rules all types of communication, traffic, short-term travels, and relationships with siblings. Youth, speed, and changeability are innate to it. This is a mutable sign and brings adaptability and shrewdness. Gemini brings change. Its element is air.