What scientific inventions and discoveries were first made by the Chinese?

In medieval India such sciences as astronomy, mathematics and medicine developed. For example, the Indian mathematician Arbhata calculated pi more accurately than the mathematicians of Ancient Greece. Probably, he also entered the number zero. Other Indian mathematicians have taken square roots, there have been discoveries in the field of geometry and trigonometry. They had algebra and numbers, which later passed on to the Arabs and further to Europe.

Indian astronomers were able to calculate the time of the Earth’s revolution around the Sun.

Doctors in India knew how to remove cataracts, suture internal organs and perform craniotomy.

In the field of metallurgy, they learned small bronze casting, and in jewelry, they learned how to grind diamonds using metal discs.

They had developed shipbuilding and shipbuilding, even the word “navigation” comes from Sanskrit.