The role of scientific community analysis and feedback in Walter Alvarez's work is that it helped him to form his theory. He was working with and received help from his team of fellow scientists. When the Alvarez team published their hypothesis linking an asteroid to the dinosaur extinction, they shared their evidence and ideas with the rest of the scientific community. The article laid out its hypothesis and evidence in a very conventional way they decided to present it linearly which allowed his colleagues in geology and paleontology to quickly understand what they were proposing and evaluate the research that they were presenting in their article. Peer review is such an essential scientific concept. I allow scientists to root out bad science.