LOL. Might I remind you that the whole scientific community used to believe the earth to be flat.. used to believe blood-letting cured illness.. etc. The idea of little things called germs that could travel from person to person if doctors didn't wash their hands between examinations was disputed as absurd. The science community lives on majority opinion and heralds itself as superior and intellectually above reproach while it holds any given belief. It derides any contestor to the point of destroying them at times. And they condescend to change only after making fools of themselves much of the time. Majority opinion ain't worth much.
When? From about a couple of hundred years BC, the learned knew the world was spherical. One of them there pagan dudes worked it out and also figured out the Earth's actual size to within a few decimal places. And, he did this all without benefit of divine revelation. Go figure.