On this day: October 31

POSTED: 9:59 PM PDT October 30, 2012    UPDATED: 11:00 PM PDT October 30, 2015 

The first All Hallows' Evening is celebrated, Nevada becomes a state, Harry Houdini dies, Mount Rushmore is completed, and the Vatican apologizes to Galileo, all on this day.

OTD October 31 - population
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bruno sersocima/SXC

2011: According to the United Nations Department of Economic and Social Affairs' Population Division, the world population reaches seven billion people.


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