Exactly. The Bible says lots of stuff about the material world, but the Bible told the ancients nothing they didn't already believe about the world. The only assertions it made that were outside of common belief of the day were ones that couldn't be examined (i.e. "spiritual").

Now, is this more likely from a book from mortal sources, or a book from an omnipotent, omniscient God trying to talk to His people? You make the call.