On March 7, 1808, President Thomas Jefferson received a long-awaited shipment of approximately 300 fossils from William Clark, who had just completed his westward expedition with Meriwether Lewis. The fossils were unearthed at Big Bone Lick in northern Kentucky, and over the years they had gained the interest of such prominent figures as Daniel Boone, George Washington, and Benjamin Franklin. Jefferson's receipt of the fossils was the realization...