There are different Christian views on cosmology and how the universe came to be: 1) Conservative/Catholic Christians view the creation stories as not literal but that science describes how God created the universe. 2) Creationist Christians view Genesis as literally true and reject evolution and the Big Bang theory. 3) Liberal Christians see Genesis as just a story and that science explains how the universe evolved over time with God as the original creator. Christians disagree on these issues because of differing interpretations of the Bible and how it relates to scientific theories of the universe.