Global Cooling? The Sun Has Been Unusually Inactive
"In the past, they observed that the sun once went 50 years without producing sunspots. That period, from approximately 1650 to 1700, occurred during the middle of a little ice age on Earth that lasted from as early as the mid-15th century to as late as the mid-19th century"
http://www.sciencedaily.com/releases/2008/06/080609124551.htm
http://www.sciencedaily.com/releases/2008/06/080609124551.htm