[p23185]

...actual temperature measurements from 14 locations on three continents... Awww! Weren't those vikings so nice to take temperatures at 14 locations to compare with today's readings?

Out of curiosity I wonder what they used for a thermometer?

[Westlander]

"Our research doesn't prove that increased CO2 is currently causing global warming, but oxygen isotopic measurements of ancient Earth temperatures suggest that this has caused global warming in Earth's past."

http://www.sciencedaily.com/releases/2002/12/021211084123.htm