Creation-science refers to the idea that the universe, Earth, and all life on it were created by a divine being. There are several synonyms for creation-science, including intelligent design, biblical creationism, and theistic evolution. Intelligent design is the belief that living organisms are too complex to have evolved through natural processes alone, and must have been designed by an intelligent entity. Biblical creationism is the belief that the Earth and its inhabitants were created by God as described in the Bible. Theistic evolution combines the theory of evolution with a belief in a divine creator who guides the process. While these beliefs differ in their specifics, they all affirm the idea of a divine creator and reject the idea of purely naturalistic explanations for the origins of life.