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 Aryabhata: the one who discovered zero 

Aryabhata was an ancient Indian mathematician and astronomer who lived during the 5th century. He is one of the earliest known Indian mathematicians and astronomers and made significant contributions to the fields of mathematics and astronomy.

1. Life and time-Aryabhata was born around 476 CE in Kusumapura, which is believed to be present-day Patna, Bihar, India.
2. Major Work-Aryabhata's major work is the "Aryabhatiya," a Sanskrit astronomical treatise. It is divided into four sections: Gitikapada (metric verse), Ganitapada (mathematics), Kalakriyapada (time calculations), and Golaapada (spherical astronomy).
3. Mathematics Contributions-Aryabhata made significant contributions to mathematics, including early developments in algebra. He introduced the concept of zero and the decimal place value system, which was a crucial step in the evolution of modern mathematics.
4. Trigonometry-Aryabhata provided trigonometric tables and introduced the sine function. He gave accurate approximate values for trigonometric ratios.
5. Astronomy Contributions-In astronomy, Aryabhata proposed a heliocentric model of the solar system, where the Earth and other planets orbit the Sun. This was a groundbreaking idea at the time.
6. Estimation of Pi (π)-Aryabhata provided an accurate approximation of the value of pi (π) and gave a method to calculate it.
7. Time Calculations-Aryabhata made detailed calculations related to time, including the length of a year and the Earth's rotation on its axis.
8. Legacy-Aryabhata's work had a profound influence on Indian mathematics and astronomy. His contributions were further studied and expanded upon by later mathematicians and astronomers in India.