Harry Potter and the Deathly Hallows – Part 1, based on J.K. Rowling’s 2007 fantasy novel, was released worldwide.
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Inventor Frederick E. Blaisdell patented the pencil in the US.
A meteorite weighing 8kg landed southwest of Odessa, Ukraine.
The University of Warsaw, Poland, was founded as a Royal University following the Partitions of Poland.
The Great Flood of St Petersburg killed 10,000 people and affected almost half a million more.
Pope Hilarius became the Bishop of Rome.