Lisa Jardine is a historian who clearly understands how science works:
The thought uppermost in my mind was how odd it is that non-scientists think of science as being about certainties and absolute truth. Whereas scientists are actually quite tentative—they simply try to arrive at the best fit between the experimental findings so far and a general principle.
Read the rest. She ties together the ideals of how science should be carried out with a story from Pepys and an unscrupulous sea captain and modern day creationists—excellent stuff!