Instagram was launched and gained 25,000 users on its first day.
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Euridice, the oldest-surviving opera, premiered in Florence, Italy.
The Moulin Rouge cabaret opened its doors in Paris for the first time.
'The Jazz Singer' was released. It was the first motion picture with pre-recorded dialogue, revolutionizing the movie industry.
Dr. Albert Sabin announced his oral vaccine against polio was ready to test.
A gunman killed 38 people in a daycare center in Thailand.
