The U.S. declared independence from Great Britain.
Former president James Monroe died.
Henry David Thoreau moved into his shack on Walden Pond.
Lewis Carroll first told the story of Alice's Adventures Underground to the Liddell sisters.
The Statue of Liberty was presented to the United States in Paris.
Katharine Lee Bates published America the Beautiful.
The United States celebrated its bicentennial.
The U.S. Pathfinder probe landed on Mars.
The European Organization for Nuclear Research, also known as CERN, announced the discovery of a new particle with properties consistent with the Higgs boson.