Who is Madhumala, who befriended Andaman tribals & returned alive?

Former Anthropological Survey of India researcher Madhumala Chattopadhyay successfully made friendly contact with the Sentinelese in 1991 after escaping an initial arrow attack. She also befriended the Jarawas and held a three-month-old baby in arms with the mother's consent. The tribes might be technologically backward but are socially far ahead of us, she said on her six-year-long research.