The Gemini twins, Castor and Pollux, are both mortal in Greek mythology. However, Pollux was granted immortality by Zeus after Castor's death.
Castor, the mortal twin, was killed in a battle. Pollux, the immortal twin, was devastated and begged Zeus to grant his brother immortality. Zeus, moved by his grief, granted Pollux's wish, but only on the condition that they would share their time between the heavens and the underworld.
This myth highlights the enduring themes of brotherhood, grief, and the power of divine intervention.
