In a deeply researched, splendidly written biography (a part of which appeared in Smithsonian), William Clark and the Shaping of the West, Landon Y. Jones gives an impressive—if not always noble ...

President Thomas Jefferson engineered the purchase of Louisiana from the French (800,000 square miles for 15 million dollars) ...

The Academy of Natural Sciences has safeguarded 222 pressed plants since the 19th century, with plans to display specimens in ...