Nikolai Vavilov was a Russian botanist, geneticist and agronomist. He was one of the great minds of the 20th century, but tragically died of starvation in prison under the Stalin regime.
John Burdon Sanderson Haldane had no formal education in any scientific subject and yet he became a commanding figure in biochemistry, evolutionary theory, genetics, and physiology, publishing over 400 papers and 24 books.
Barbara McClintock was an American geneticist. Her discovery of transposons revolutionised our understanding of genetics. She was awarded the Nobel Prize in Medicine or Physiology in 1983.
