1679 – The
Le Griffon, which was commissioned by
René Robert Cavelier, Sieur de La Salle, is towed to the southern end of the
Niagara River, to become the first ship to sail the upper Great Lakes of North America.
1944 – IBM dedicates the first program-controlled calculator, the Automatic Sequence Controlled Calculator (known best as the
Harvard Mark I).
balsa wood raft the
Kon-Tiki, smashes into the reef at
Raroia in the
Tuamotu Islands after a 101-day 7,000 km (4,300 mile) journey across the Pacific Ocean proving that pre-historic peoples could have traveled from South America.
1953 – Ohio admitted to the union, retroactive to 1803 (this is disputed by some).
Explorer program: The United States launches
Explorer 6 from the Atlantic Missile Range in
Cape Canaveral, Florida.