New Windows on Giant Planet Structure and Composition

In our current era of planetary physics we can use the astronomical perspective
 to look for trends in giant planet structure that can only be seen with a 
large sample size.  We can also use detailed observations of Jupiter and 
Saturn, provided by Juno and Cassini, to test if long-held assumptions about 
giant planets really hold true.  I will discuss several exoplanet topics 
including the giant planet mass-metallicity relation, connections with 
atmospheric abundances, and the radius anomaly of hot Jupiters.  These works 
rest on a standard modeling framework for giant planet structure and evolution 
that can be tested in detail for Jupiter and Saturn.  For Saturn specifically, 
I will show how Cassini inferences of the gravity field and internal oscillation
s probe the planet's interior structure in new ways.