If you think she only did it for the money, you haven't even 'scratched the surface'. [=there are many other factors, reasons, etc., involved]
Despite the 'surface' differences between the two candidates, they are very similar in most ways.
The tension between them is beginning to 'rise to the surface'. [=it is becoming easy to see]
(..) more radioactive than it is today. This animal, and others like it, consumed this radiation as a food source. But as the levels on the surface naturally subsided, these creatures adapted and lived deeper in the oceans. Further underground, absorbing radiation from the planet's core. (..)2014 Godzilla