The Indian Ocean is the third largest of the world's oceanic divisions, covering 70,560,000 sq. km (27,240,000 sq mi) (approximately 20% of the water on the Earth's surface).It is bounded by Asia on the north, on the west by Africa, on the east by Australia, and on the south by the Southern Ocean or, depending on definition, by Antarctica. It is named after India. The world’s earliest, historical, and most iconic civilizations emerged in the areas surrounding the Indian Ocean (Mesopotamia and Indus Valley, anyone?). But this is not the only thing that is interesting about this great body of water. Its vastness hides a lot of mysteries, which scientists have been constantly working on to decipher and discover up to this very day.