Srinivas Ramanujan: Eccentric Tamil Brahmin number- cruncher who said the deity, Nammakkal, helped him fix problems of number theory.
Jagdish Chandra Bose: Who demonstrated in 1895, two years before Marconi's wireless, that electro-magnetic waves could be used to ring a bell; that plants responded to stimuli.
Meghnad Saha: Who won a Nobel nomination in 1935-36 for telling the world at 27 how stars burn their fuel.
Satyendranath Bose: Worked with Albert Einstein on quantum mechanics. Their conclusions about matter at -273 degrees C was proved recently. The particle Boson is named after him.
Subramanyam Chandrashekhar: Nobel Prize winner, who as a 21-yer-old worked out that stars with a mass more than 1.4 times greater than the sun must eventually collapse into an object of enormous density (now called "black holes"). Today, the Chandrashekhar Limit is the bedrock of astrophysics.
Hargobind Khurana: Cracked the genetic code and said each was a three-lettered chemical unit...