PHILADELPHIA (WPVI) -- Meriwether Lewis and William Clark's westward trek mapped a route to the Pacific in the early 1800s, and the "Botany of Nations" explores the plants they collected along the way ...
The Academy of Natural Sciences and the Mütter Museum have exhibitions about the role of plants in nation building.
The Academy of Natural Sciences of Drexel University has an exhibition rich with artifacts and plant specimens from the Lewis ...
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