The Hebrides ( HEB-rid-eez; Scottish Gaelic: Innse Gall, pronounced [ˈĩːʃə ˈkaul̪ˠ]; Old Norse: Suðreyjar, lit. 'Southern isles') are an archipelago off the west coast of the Scottish mainland. The islands fall into two main groups, based on their proximity to the mainland: the Inner and Outer Hebrides. These islands have a long history of occupation (dating back to the Mesolithic period), and the culture of the inhabitants has been successively influenced by the cultures of Celtic-speaking, Norse-speaking, and English-speaking peoples. This diversity is reflected in the various names given to the islands, which are derived from the different languages that have been spoken there at various points in their history. The Hebrides are where much of Scottish Gaelic literature and Gaelic music has historically originated. Today, the economy of the islands is dependent on crofting, fishing, tourism, the oil industry, and renewable energy. The Hebrides have less biodiversity than mainland Scotland, but a significant number of seals and seabirds. The islands have a combined area of 7,285 km2 (2,813 sq mi), and, as of 2011, a combined population of around 45,000. Source: Wikipedia (en)