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Hypnos was also said to live in the underworld. Hypnos, the god of peaceful sleep, and Thanatos, the god of peaceful death, were twin brothers. The ancient Greeks drew direct connections between sleep and death. However, Hera convinced him to help by promising him Pasithea (pronounced puh-SITH-ee-uh), one of the Graces, as his bride. At first, Hypnos hesitated, fearful of Zeus's anger. She asked him to put the king of the gods, Zeus (pronounced ZOOS), to sleep to prevent him from interfering on behalf of Troy. In the Iliad, Homer tells a story about the goddess Hera (pronounced HAIR-uh), the queen of the gods, requesting help from Hypnos during the Trojan War.
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The most important ones were Morpheus (pronounced MOR-fee-uhs), who caused sleepers to dream about people Icelus (pronounced EYE-suh-luhs), also known as Phobetor (pronounced foh-BEE-tor), who delivered dreams about animals or monsters and Phantasos (pronounced FAN-tuh-sohs), who brought dreams about lifeless objects. The Dreams, some of his many sons, lived with him. Lethe (pronounced LEE-thee), the river of forgetfulness, rippled through his dim, foggy cave. Some writers claimed that Hypnos lived in the underworld, or land of the dead, but others said that he dwelled in a cave on the Greek island of Lemnos (pronounced LEM-nohs). According to Greek myth, he was the son of Nyx (pronounced NIKS), the goddess of night, and his brother was Thanatos (pronounced THAN-uh-tohs), the god of death. Hypnos hid from the sunlight during the day.
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The ancient Greeks said that Hypnos, the god of sleep, visited people during the dark of night to ease them into a state of rest. Hesiod's Theogony, Ovid's Metamorphoses, Homer's Iliad
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