Islamic Golden Age scholar Muḥammad ibn Aḥmad Al-Biruni (973–1048) in Tarikh Al-Hind (Researches on India) recorded the political and military history of India and covered India's cultural, scientific, social and religious history in detail.[5] He studied the anthropology of India, engaging in extensive participant observation with various Indian groups, learning their languages and studying their primary texts, and presenting his findings with objectivity and neutrality using cross-cultural comparisons.[6]