Biography.com’s ‘I Never Knew That’ series examines how a descendant of the famous explorers tied his family’s legacy to the ...

The one that every schoolchild learns about began in 1804, when Thomas Jefferson sent Meriwether Lewis ... which enable the creation of maps in three dimensions. Lewis and Clark traveled for ...

We begin this month with Jefferson’s June 20, 1803, directive to Meriwether Lewis outlining the president’s goals for the expedition. We’ve kept his sometimes unique spelling and punctuation ...