Question

why ancient people does not know the whole world whoch is known to us at present​

Answer 1

it's because improvements and achievements in technology:)

Answer 2

Answer:

Due lack of communication and transportation at that time, as that time there was no manifestation in develop through science and technology. But, gradually due to advent of globalization and access to informations this problem is sorted. Thus, we are familiar to the entire world, which was not possible in ancient period.

hope this will help you