India

Physicist and statistician Prasanta Chandra Mahalanobis (29 June 1893– 28 June 1972), who founded the Indian Statistical Institute in 1931, is known for his pioneering application of statistics to practical problems.

Sálim Moizuddin Abdul Ali (12 November 1896 – 20 June 1987), commonly referred to as the Birdman of India, was the first person to conduct systematic surveys of birds from across India.

Indian botanist Shipra Guha-Mukherjee (13 July 1938 – 15 September 2007) made a breakthrough discovery that enabled the genetic study of plants and, by extension, the development of improved varieties of rice, wheat, potatoes, and other crops.

The founder of the Adyar Cancer Institute in India, Muthulakshmi Reddy (30 July 1886 – 22 July 1968), fought to uplift women and girls from impoverished situations.

Maharani Chakravorty (1937 – 2015) was one of India’s earliest molecular biologists whose research paved the way for advances in the treatment of bacterial and viral infections.

Archana Sharma (16 February 1932 - 14 January 2008) conducted research into plant and human genetics that expanded the understanding of both botany and human health. In relation to botany, she uncovered the means by which asexually-reproducing plants evolve into new species.

Sir Mokshagundam Srinivasa Shastry Vishveshwarayya (15 September 1860 – 14 April 1962) is widely regarded as India’s most outstanding engineer. In a career that spanned almost his entire life, Vishveshwarayya played a pivotal role in several engineering projects, including designing the Krishnarajasagara dam that is still the source of irrigation and drinking water for parts of Karnataka today.

A pioneer of bio-organic chemistry, Darshan Ranganathan (4 June 1941 – 4 June 2001) is remembered for developing a protocol for synthesising imidazole, a compound used to make antifungal drugs and antibiotics. Widely considered India’s most prolific researcher in chemistry, she also published dozens of papers in renowned journals on protein folding, molecular design, chemical simulation of key biological processes, and the synthesis of functional hybrid peptides and nanotubes.

Ground-breaking cancer researcher Kamal Jayasing Ranadive (8 November 1917 – 11 April 2001) advanced the understanding of the causes of leukaemia, breast cancer and oesophageal cancer through the use of animal models. She was also among the first to recognise how susceptibility to cancer is linked to tumour-causing interactions between hormones and viruses.

Birbal Sahni (14 November 1891 – 10 April 1949), a pioneer of Indian palaeobotanical research, and founder of what is now the Birbal Sahni Institute of Palaeosciences in Lucknow, made multiple contributions to the study of prehistoric plants. These include the discovery of a new group of fossil gymnosperms (named Pentoxylae), reconstruction of the extinct Williamsonia sewardiana plant, and description of a new type of petrified wood from the Jurassic age.

Indian scientist and physician Upendranath Brahmachari (19 December 1873–6 February 1946) is best known for creating a drug called Urea Stibamine, used to safely and reliably treat visceral leishmaniasis (or Kala-azar), a severe infection caused by the Leishmania parasite.

In 1939, biochemist Kamala Sohonie (18 June 1911 – 28 June 1998) became the first woman to be accepted into the Indian Institute of Science (IISc).

Physicist Narinder Singh Kapany (31 October 1926 – 4 December 2020) pioneered the use of optical fibres to transmit images, and founded several optical technology companies. Born in Punjab, India, he worked at a local optical instruments factory before moving to London for PhD studies at Imperial College. There, he devised a flexible fibrescope to convey images along bundles of glass fibres.

Indian organic chemist Asima Chatterjee (1917 to 2006) studied the medicinal properties of plant products, especially compounds known as vinca alkaloids.

Meghnad Saha (6 October 1893 – 16 February 1956) was an Indian astrophysicist best known for formulating the Saha ionization equation which describes the chemical and physical properties of stars.

Subrahmanyan Chandrasekhar (19 October 1910 – 21 August 1995) was an Indian astrophysicist who studied the structure and evolution of stars.

Sir Chandrasekhara Venkata Raman (7 November 1888 – 21 November 1970) was an Indian physicist who performed ground-breaking research in the field of light-scattering.

Janaki Ammal Edavalath Kakkat (4 November 1897 – 7 February 1984) was an Indian botanist who studied plant chromosomes and genetics.

Srinivasa Ramanujan (22 December 1887 – 26 April 1920) was a math prodigy and widely considered one of India’s greatest mathematicians. Despite having almost no formal training in mathematics, he made substantial contributions to mathematical analysis, number theory, infinite series and continued fractions.

Gopalasamudram Narayanan Ramachandran (8 October 1922 – 7 April 2001) is best known for developing the Ramachandran plot to understand the structure of short chains of amino acids, known as peptides.

Rajeshwari Chatterjee (24 January 1922 – 3 September 2010) was the first female engineer from Karnataka in India.

Bibha Chowdhuri (1913 – 2 June 1991) was an Indian physicist who researched on particle physics and cosmic rays. In 1936, she was the only female to complete a M.Sc. degree at the University of Calcutta.

Anna Mani (23 August 1918 – 16 August 2001) was an Indian meteorologist who contributed significantly to the understanding of solar radiation, ozone and wind energy by developing a wide range of measurement tools. One of India’s pioneering female scientists, Mani excelled in the male-dominated area of meteorology and became the Deputy Director-General of the India Meteorological Department.