I could have said "earth" instead of "universe," though the earth is typically considered as part of the equation of dating the universe because it is a part of the universe, and is the vantage point from which any extrapolations are made. So I will not deny the physics aspect of extrapolation, but we both know that the geological dating is based on the carbon dating method--which is heavily used as evidence to support the age of the earth--which is part of the dating equation--which assumes uniformitarianism as part of its dating methodology. Even in physics we extrapolate by what we know in the present.
The church once taught that the world was the centre of the universe...now, thanks to science, we know that the world is a speck of dust in an incomprehensibly vast universe.
