WASHINGTON, D.C. (KBSI) — An American paddlefish from Missouri will be featured in a new Smithsonian exhibition highlighting the natural and cultural heritage of all 50 states as part of the nation’s 250th anniversary celebration. The Smithsonian National Museum of Natural History will open “From These Lands: Sharing Our Natural and Cultural Heritage” on June 18. The 5,000-square-foot exhibition will showcase more than 600 specimens and cultural…