The Importance of Precision in Cosmology

There's definitely a lot of extrapolation and you know something that's happened recently is that cosmology has become a precision science. We have a pretty good picture to within you know like one percent. So we could certainly be wrong about it but I'd be surprised. The history of physics is filled with examples of times when we thought we knew what we're doing and then it was all blown up because we discovered something which shakes the foundations.