Here lives a tribe isolated from the world, manifested extremely violent with all those who dare to tread territory. Intruders are most often killed.
People here live as in the Stone Age and occupation as picking, hunting and fishing. Sentinelezii is one of the oldest populations in the world, having existed for more than 70,000 years.
What is truly amazing is that people here were not at all touched by modern civilization. Sentinelezii use fire and then keep it jealously, because not know how to get it. Do not wear clothes and use bows or spears to defend.
Their language was studied and it does not seem like anything known before.
Any alien who venture here is attacked with stones and arrows. No helicopters are not too close to North Sentinel Island. Therefore, Indian officials have decided to ban a radius of three miles from the island
https://www.youtube.com/watch?v=36oEfXCZRYk&feature=player_embedded