There are many reasons explained by many scientists for proving that the earth is round. When we want to achieve something and try but could not do that. we will say the earth is round. But even today some put forward different theories to say that earth is flat.
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
At the same time there are some traditional beliefs and ideas which are firmly attached in the minds of people and it is difficult to dislodge those things and adopt everything as science is telling us. Time to time religious leaders and some other socially influential people who are not much interested in scientific ideas will repeat and re-illustrate information about some old traditions and old values and try to impress that those things were correct and today what science is telling is not correct.
So as per our knowledge and understanding it is up to us to choose one of those things between the old things or scientific progresses.
Knowledge is power.