I believe that the Bible has greater authority than nature. Creation is “general” revelation only. The Bible is special, much more specific, revelation. Creation reveals that there is a Creator, and it reveals his attributes, eternal power and divine nature (Rom 1:20). The Bible tells us that God’s Word is sufficient, adequate, equipping for every good work (2 Tim 3:16). Let me acknowledge that there are degrees of clarity (and often, assumption) that must be considered. But we must take care not to elevate the theories of man (whether they be “young earth,” “old-earth,” evolutionary, etc.) to a position of equal or greater importance than the Word of God.