The Italian government asked for advice on how to stop the Leaning Tower of Pisa from leaning too far and collapsing.
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Scientists observed the biggest explosion in the universe, 390 million light-years away.
The world's smallest baby was finally released from the hospital months after being born.
Henry IV took to the throne as he was crowned the King of France.
Two scientists from the University of California Radiation Laboratory discovered carbon-14, a new isotope of carbon.
The Reichstag, Germany's parliament building, was set on fire by a Dutch communist.
