history and maps
http://www.oldmapsonline.org
http://mappery.com/
http://des.nh.gov/organization/commissioner/pip/publications/geologic/index.htm
http://magnetic-declination.com/
http://en.wikipedia.org/wiki/Category:Years_in_architecture
weather and spaceweather
http://www.swpc.noaa.gov/index.html
http://www.paranormalweather.com/
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