Nikola Tesla tried to explain how the phenomenon of ball lightning works.
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Beethoven's 4th Symphony in B was performed for the first time.
Pope Francis made history when he became the first pope to visit Iraq.
After a four-month journey, the Venera 14 spacecraft landed on Venus.
The battle of the Ruhr campaign began during WWII with an air raid in Essen, Germany.
Colorado became the birthplace of the cheeseburger.
