It has approximately 11,000 inhabitants and during the tourist season (May-September) its population reaches up to 200,000.
It is supposed (H. Pichler) that the island was created by a succession of four volcanic movements, the most important of which should be the third one, presumably lasting from 20000 BC to 13000 BC. A further important phenomenon should have happened around 9000 BC (C14 exams by Keller).
Its history is indeed very ancient (and rich of passages) and is witnessed by the recent retrievals of several necropolis and other archaeological treasures. Man seems to have inhabited the island already in 5000 BC. It was, with Sardinia, one of the few centers of the commerce of obsidian.