Christians, why do you longer believe in...?

What the Bible is saying is, the templates for these natural processes was designed and sealed by God and originality is maintained even in adverse cases of multiple crosses, natural selection, mutation and wear and tear of the earth and other bodies. And just because ancient men believed that the earth was flat does not change the fact that the template of the earth is spherical, that is why God gave man knowledge to study and understand His works. Cheers.