But it can also be the result of a number of health conditions, such as: 1  Noise-induced hearing loss. 2  Ear and sinus infections. 3  Diseases of the heart or blood vessels. 4  MÃ©niÃ¨reâs disease. 5  Brain tumors. 6  Hormonal changes in women. 7  Thyroid abnormalities.
The Aryan Migration. Before the time of the Aryan migration into the Indian subcontinent, there was a highly developed civilization in ancient India known as the Indus Valley Civilization, which was located in what is Pakistan and northwest India today, on the fertile flood plain of the Indus River and its vicinity.he Aryan Migration. Before the time of the Aryan migration into the Indian subcontinent, there was a highly developed civilization in ancient India known as the Indus Valley Civilization, which was located in what is Pakistan and northwest India today, on the fertile flood plain of the Indus River and its vicinity.
But in the 1920s, a huge discovery in South Asia proved that Egypt and Mesopotamia were not the only early civilizations.. In the vast Indus River plains (located in what is today Pakistan and western India), under layers of land and mounds of dirt, archaeologists discovered the remains of a 4,600 year-old city.ut in the 1920s, a huge discovery in South Asia proved that Egypt and Mesopotamia were not the only early civilizations.. In the vast Indus River plains (located in what is today Pakistan and western India), under layers of land and mounds of dirt, archaeologists discovered the remains of a 4,600 year-old city.