[VeniVidiVici]

surface temperatures during the most recent ice age - 21,000 years ago - when humans were having no impact on global temperatures, he, and his colleagues show that this period was not as cold as previous estimates suggest.

Yes, ice was warmer back then.

[Mr. K]

This is ALL BULL$HIT because of one very important reason- SIGNIFICANT FIGURES

If you measure with a yardstick, it is impossiblke to quote measurment size in FEET or INCHES.

You can say 1.5 yards (approx.) but you can not accurately say 1.5005 yards, or 1 yard, 1 ft, 6.5 inches. That is too many significant figures.

The resolution is not there to make such fine measurements

Similarly, If you only have TREE RINGS to go by, there is no way possible to say that temperatues are 0.5 degrees warmer now.