"She also told me about the night one of her astrophysics friends went to a bar trivia contest where the final question was "What does Kelvin measure?" The winning answer was "heat," but her friend explained that Kelvin measures temperature, not heat, since heat is energy and is measured in energy units like joules or ergs. The astronomer refused to back down, until the battle had to be settled with a chug-off. These astro people are hard-core."