Oral radition VS Writen Recod

clipped from en.wikipedia.org

In prehistoric times, advice and knowledge was passed from generation to generation in an oral tradition. The development of writing enabled knowledge to be stored and communicated across generations with much greater fidelity.

The precession of Earth's axis can be used to grasp just how ancient is the study of astronomy; there were astronomers in India 6500 years ago; at that time, the vernal equinox was in Orion (around 4500 BC) as mentioned in the Vedas.

The idea that the Sun was at the centre of the solar system, and hence a heliocentric solar system, was first discovered sometime between 1500 BC and 500 BC in the Vedic literature of ancient India, such as the Vedas which often referred to the Sun as the "centre of spheres".

clipped from en.wikipedia.org

Fields of Indian mathematics

Arithmetic: Decimal system, Negative numbers (see Brahmagupta), Zero (see Hindu-Arabic numeral system), the modern positional notation numeral system,

Geometry: Square roots

Algebra: Quadratic equations

General mathematics