Catholics who believe that the Bible is just an interpretation and not literal are known as non-literalists.
Non-literalists believe that the world was created in 6 long periods of time, not 6 ordinary 24 hour days.
The Big Bang Theory and the theory of evolution are compatible with the understanding of non-literalists. They believe that God was the cause of these theories.
Some non-literalists believe that there is no factual information in Genesis and that it is a poetic story with a message for believers.