The Nature Index is a database of author affiliations and institutional relationships.
The database is compiled by Nature Research, a division of the international scientific publishing company Springer Nature which is an American German academic publishing company based in Germany.
The top five positions have gone to the United States of America, China, Germany, United Kingdom and Japan.
The overall ranking of India is 12th in the index and top 3 Ranking of Institutions from India are
Council of Scientific and Industrial Research (CSIR)
Indian Institute of Sciences (IISc)
Tata Institute of Fundamental Research (TIFR)
Three of the autonomous institutions of the Department of Science & Technology, Government of India have also found their place among top 30 Indian Institutions.
These are
The Indian Association for the Cultivation of Science (IACS), Kolkata - at 7th position
Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalore - at 14th position
S. N. Bose National Centre for Basic Sciences, Kolkata - at 30th position.