Heliocentrism along with 'roundness' of the earth was first hypothesized ~300bc by Aristarchus [1], and the circumference of the earth was first estimated some

Heliocentrism along with 'roundness' of the earth was first hypothesized ~300bc by Aristarchus [1], and the circumference of the earth was first estimated some time later by Eratosthenes [2]. The scientific inquiry and its attack on religion unsurprisingly seems to align itself with the intellectual strides of humanity. [1] https://en.wikipedia.org/wiki/Aristarchus_of_Samos https://en.wikipedia.org/wiki/Aristarchus_of_Samos [2] https://en.wikipedia.org/wiki/Eratosthenes https://en.wikipedia.org/wiki/Eratosthenes