June 15, 1667 (354 years ago)
•The first human blood transfusion is administered by Dr. Jean-Baptiste Denys.

June 15, 1752 (269 years ago)
•Benjamin Franklin proves that lightning is electricity.

June 15, 1804 (217 years ago)
•New Hampshire approves the Twelfth Amendment to the United States Constitution, ratifying the document. This Amendment provides the procedure by which the President and Vice President are elected.

June 15, 1836 (185 years ago)
•Arkansas is admitted as the 25th U.S. state.

June 15, 1911 (110 years ago)
•Tabulating Computing Recording Corporation (IBM) is incorporated.

June 15, 1916 (105 years ago)
•U.S. President Woodrow Wilson signs a bill incorporating the Boy Scouts of America, making them the only American youth organization with a federal charter.

June 15, 2002 (19 years ago)
•Near earth asteroid 2002 MN missed the Earth by 75,000 miles (120,000 km), about one-third of the distance between the Earth and the Moon

June 15, 2007 (14 years ago)
•Bob Barker hosts his final episode of The Price Is Right