How old is the Earth?!

Before yapping on about ignorant views, do your own research to find out what scientist honestly think. You have come up with stupid statements like people once thought the world was flat, but failed to comment that before the advent of christianity, the ancient greeks took it as common knowledge that the world was a sphere. It has been the church that historically prevents the advance of science, or swings it retrograde (e.g. Earth as centre of universe). Listen to others and stop being so opinionated. Where's your reasoning behind "No leading scientist would hold allegance to [the big bang] theory today?" Discuss (don't argue).