In the late 19th century, William Randolph Hearst and Joseph Pulitzer developed what would come to be known as yellow journalism. By disregarding what had been standard journalistic methods, particularly in regards to the verifying of sources, these two publishers were able both to push their country toward war with Spain and dramatically increase the circulation of their respective newspapers.

Man has always had a healthy desire for knowledge, and it is the feeding of this hunger that ennobles journalism. Hearst and Pulitzer were acutely aware that man has a less healthy but no less voracious desire to believe that he has knowledge, particularly knowledge of something sensational. It is the feeding of this hunger that irreparably disgraced journalism, and a century later now threatens to do the same to science.

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Scientists, like journalists, are called upon to plumb the depths of the unknown and to fairly and objectively report their findings to their own professional community as well as the general public. Scientists, like the journalists of yesteryear, have specific methods for ensuring that the public trust placed in them is not abused. The most fundamental of these methods is the well-known, if not so creatively named, scientific method. The essence of the scientific method is the formulation of hypotheses (ideas) and the using of these hypotheses to make predictions that can be experimentally tested. In the words of Sir Arthur Eddington in "The Philosophy of Physical Science," "Every item of physical knowledge must therefore be an assertion of what has been or would be the result of carrying out a specified observational procedure."

Nevertheless, over the past several decades an increasing number of scientists have shed the restraints imposed by the scientific method and begun to proclaim the truth of man-made global warming. This is a hypothesis that remains untested, makes no predictions that can be tested in the near future, and cannot offer a numerical explanation for the limited evidence to which it clings. No equations have been shown to explain the relationship between fossil-fuel emission and global temperature. The only predictions that have been made are apocalyptic, so the hypothesis has to be accepted before it can be tested.