In the late 19th century, Newtonian physics was the model that most scientists subscribed to as it seem to explain a great deal about how the universe worked. However, there was a problem, Newtonian physics couldn’t account for certain aspects of mercurys orbit so scientist theorised an additional planet somewhere between mercury and the sun which they named Vulcan and they conducted searches to try and locate it, many respectable scientist claimed that they had seen it. Then with the introduction of Einsteinian relativity, there was no more need for Vulcon to explain Mercury’s orbit. I find this very troubling, if Vulcan never existed what was it that all those credible scientists saw, completely shattered my high school idea of scientists as people who follow the data and rush to falsify their theories, it seems more like they have a theory which works most of the time and in the case where it doesn’t they massage it with proposed explanations which will fit the data into the theory.