Sweden introduced a groundbreaking Freedom of Press Act, becoming the first nation to introduce freedom of speech.
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The world's first self-sustaining nuclear chain reaction happened in Chicago Pile-1 at the University of Chicago. It was overseen by Enrico Fermi.
Paleoanthropologist Louis Leakey discovered a 1.4 million-year-old Homo erectus in Olduvai Gorge, Tanzania.
Napoleon Bonaparte was crowned the Emperor of France in Paris.
The Battle of Tirad Pass was fought.
The first artificial heart was successfully implanted.
