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1909 in science
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==Geology== * January 16 – [[Ernest Shackleton]]'s expedition locates the [[South Magnetic Pole]].<ref>{{cite web|url=http://deeptow.whoi.edu/southpole.html|title=The Magnetic South Pole|publisher=[[Woods Hole Oceanographic Institution]], Magnetics Group, Ocean Bottom Magnetology Laboratory|accessdate=2011-02-25|archive-url=https://web.archive.org/web/20160421112934/http://deeptow.whoi.edu/southpole.html|archive-date=2016-04-21|url-status=dead}}</ref> * April 6 – [[Robert Peary]], [[Matthew Henson]], and four [[Eskimo]] explorers come within a few miles of the [[North Pole]]. * October 8 – An earthquake in the [[Zagreb]] area leads [[Andrija Mohorovičić]] to identify the [[Mohorovičić discontinuity]].
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