The Stories of 12 Constellations – Cancer. Born from June 22nd to July 22nd, “Cancer” is the fourth sign of the Zodiac.MythologyIn Greek mythology, it is said that when the hero Hercules fought against the serpent-like monster Hydra (Hydra constellation) with nine heads, the monster crab who took Hydra`s side was trampled by Hercules and became a constellation.Why did the big crab that was defeated so easily become a constellation? ?In fact, Hercules was so strong, that his mother-in-law Hera, w