India invented the Number System.
Zero was invented by Aryabhatta.
The decimal system was invented in India in 100 BC.
Aryabhatta was also the first to explain the spherical shape, size,
diameter, rotation and correct speed of the Earth in 499D.
(Source: The Essence of Science in Ancient India by
Ramandeep Kaur published by Bhartiya Vidya Mandir)