MSNBC reports:

The study, appearing in Friday’s issue of the journal Science, analyzed ancient tree rings from 14 sites on three continents in the northern hemisphere and concluded that temperatures in an era known as the Medieval Warm Period 800 to 1,000 years ago closely matched the warming trend of the 20th century.

...the study shows Earth to be “capable of rapid changes and long periods of above average warmth on its own without greenhouse warming."

Wait, there's more...Ice shelf stories misled the public Plus...Tuvalu isn't sinking after all