Evolution: Science, Pseudo-Science, or Both?

This is really just a question that I wanted to ask. There were major advances in the development of scientific method during the Renaissance and the Age of Enlightenment. There were also roadblocks to scientific advancement from practices of the past, which we today refer to as pseudo-science. Now the characteristics of science and pseudo-science dramatized in the play Galileo and the Longitude video series how can you discuss at least one or more present day examples of this conflict? Also could you help to support your idea with examples, statistics, and quotes please.