NASA's Earth temperature study:

A new study by NASA scientists finds that the world's temperature is reaching a level that has not been seen in thousands of years.

Excerpt:
Because of a rapid warming trend over the past 30 years, the Earth is now reaching and passing through the warmest levels seen in the last 12,000 years. This color-coded map shows average temperatures from 2001-2005 compared to a base period of temperatures from 1951-1980. Dark red indicates the greatest warming and purple indicates the greatest cooling.