Here's a thought experiment. In the old days they thought the earth was the centre of the universe and the sun orbited the earth. Then Copernicus came along and debunked that theory. Then Newton came along and told us about gravity and how everything was affected by this. Then Einstein came along and told us objects fall because they are being warped by the very fabric of space/time and not gravity. Then Tweeby came along and told us... I know @Sarah Walker will like this one!
