The knowledge base of ancient India is quite vast , seemingly endless.
Mathematics, Physics, Chemistry, Botany, Biology, Zoology,Gynecology, Surgery including Plastic surgery,Cell research, Aviation, Gravity, Medicine, Architecture,Sculpting,Painting,Warfare..
Advanced concepts in Mathematics has a special place.
And extensive knowledge of Geography.
This can be evidenced from the descriptions of the world in the Puranas.
And the detailed explanation of geographical locations in the Sundarakanda of Ramayana,when Sugreeva directs the vanara senas to search for Sita.
It would be interesting to note that World Time Zones Concept was devised in ancient. India by Baskaracharya,12th Century AD, in his Siddhandha Siromani.
The West devised this World Time Zones Concept in its rudimentary state in 18th Century.
‘Bhaskaracarya mentions the time difference between the important cities situated in different parts of the world in his Siddhanta Siromani(Goladhyaya) thus:
“When the sun rises at Lanka, the time as at Yakakotipura to the east of Lanka, will be midday. Below the earth at Siddhapura, it will be twilight then, and at Romakadesa in Europe, the time will be midnight.
For more information.
on Greater India: Suvarnabhumi and Sacred Angkor and Seafaring in Ancient India. For Hindu Astronomy refer to chapter Hindu Culture. Refer to India once ruled the Americas!– By Gene D Matlock.
Time Zones in Modern Thought.