Topography and climate Bordered by a coastal plain south and east, with interior mountains, plateaus, and forests. Along the Mississippi’s banks, wetlands stretched farther than the eye could see. As the weather slowly warmed, snow receded from the mountaintops and the lowlands blossomed. Glacial meltwaters fed growth along the rivers.
Plant and animal life With the warming, evergreens gave way to deciduous trees on the mountain flanks. A broad savannah stretched far beyond the modern coastline. Plants and animals thrived. Wetlands were a haven for waterfowl; soon-to-be-extinct species like saber tooth tiger existed alongside wolves and deer.
When the first people arrived Estimated sometime before 13,500 years ago, although scientists are not certain. next >>