Sentineli, North Sentinel Island, Andaman Islands, Bay Of Bengal, Indian Ocean

Their dwellings are either shelter-type huts with no side walls and a floor sometimes laid out with palms and leaves, which provide enough space for a family of three or four and their belongings, or larger communal dwellings which may be some 12 square metres (130 sq ft) and are more elaborately constructed, with raised floors and partitioned family quarters.
Advanced metalwork is unknown, as raw materials on the island are extremely rare. It has been observed, however, that they have made adroit use of metal objects which have washed up or been left behind on their shores, having some ability at cold smithing and sharpening iron and incorporating it into weapons and other items. For example, in the late 1980s two international container ships ran aground on the island's external coral reefs; the Sentinelese retrieved several items of iron from the vessels.
The 1880 British expedition to the island led by Maurice Vidal Portman reported that "their methods of cooking and preparing their food resemble those of the Öngés, not those of the aborigines of the Great Andaman."
Their weaponry consists of javelins and a flatbow with high accuracy against human-sized targets up to nearly 10 metres (33 ft). At least three varieties of arrows, apparently for fishing and hunting, and untipped ones for shooting warning shots, have been documented. Fishing arrows have a number of forward-pointing prongs; hunting arrows have ovoid arrowheads, with bodkin-type tips for both purposes, the latter two as well as their associated barbs below the tip made from iron. The arrows are over 1 m (3 ft) long. The harpoon- or javelin-type arrows are nearly half as long again, about the same length as the bows (over 3 m (10 ft)), and can also be thrown or used for stabbing, but the latter probably only rarely.