The hardiness zones are informative: the extremes of winter cold are a major determinant of whether a plant species can be cultivated outdoors at a particular location; however, the USDA hardiness zones have a number of drawbacks if used without supplementary information.
The event grew out of âNegro History Week,â the brainchild of noted historian Carter G. Woodson and other prominent African Americans. Since 1976, every U.S. president has officially designated the month of February as Black History Month.
Black History Month: Smithsonian museum shows history is all around us. For the thousands present for the museum's opening last fall, history was in the crowd.