How do we know the specific details of Lewis and Clark's expedition out West? A. By traveling with them
B. By examining their journals, notes, and drawings
C. By reviewing photo albums and short videos
D. By looking through their suitcases
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White dwarf is very hot, but also very small and that is why it may appear dim.

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.