Instagram was launched and gained 25,000 users on its first day.
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The drama romance film 'Days of Heaven' by Terrence Malick was released.
The 51 Pegasi b planet was discovered. It was the first discovered exoplanet around a sun-like star.
The largest music fraternity in the USA, Phi Mu Alpha Sinfonia, was founded.
Dr. Albert Sabin announced his oral vaccine against polio was ready to test.
Pope John Paul II became the first pope to visit the White House in Washington, D.C.
