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.
Mesopotamia - Amazing Facts about the Cradle of Civilization. Mesopotamia is widely considered to be the longest and oldest human civilization, where the earliest cities in world history appeared about 3500 BC. It refers to the Tigris-Euphrates river system and corresponds to the modern day Iraq, Kuwait and some parts of Syria, Turkey and Iran. For West, the Bronze Age Mesopotamia is the real cradle of civilization which consisted of four empires, all native to the territory of modern day Iraq.