Coffee is a hot drink that tastes really, really, really good. You should probably try some immediately, there are shops in town where they sell it or else there's usually a pot in the complex kitchen. Kryptonian is a race of people that are here, well, Clark is one and Kon is half-Kryptonian. They can fly and they're mostly invulnerable and they can do a lot of other ridiculous things like shoot heat out of their eyes.