Why are Gemini twins?

Could you please elaborate on the phrase "Gemini twins"? Are you referring to the astrological sign Gemini, which is often associated with the twins Castor and Pollux in Greek mythology? If so, the concept of Gemini twins arises from this mythological association, where the twins were said to have been born from the same mother but different fathers. In astrology, Gemini is seen as a symbol of duality and adaptability, potentially reflecting the idea of two individuals within one, just as the twins Castor and Pollux were. However, it's important to note that astrology is not a scientific field and the idea of Gemini twins as a literal or definitive characteristic is not universally accepted.