TheNativeAmericaninterpreterSacajaweawasavaluablememberoftheLewisanddarkexpeditionin1805.

Urban renewal programs strive to upgrade areas that are becoming slums.

DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.

Bythenineteenthcentury,embroideryonmen'sclothinghadvirtuallydisappearedexceptfortheoccasionaldecorativevestandtie.

Solid geometry has enabled astronomers to calculate the positions of the heavenly bodies relative to one another.