(LINKS TO STUDY ABSTRACT AND ADDITIONAL INFORMATION ARE BELOW)
Scientists look at an ice core from the West Antarctic Ice Sheet Divide coring site. Credit: Thomas Bauska, OSU
CNN - by Ben Brumfield - March 8, 2013
Global warming has propelled Earth's climate from one of its coldest decades since the last ice age to one of its hottest -- in just one century.
A heat spike like this has never happened before, at least not in the last 11,300 years, said climatologist Shaun Marcott, who worked on a new study on global temperatures going back that far.
"If any period in time had a sustained temperature change similar to what we have today, we would have certainly seen that in our record," he said.
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Study Abstract - A Reconstruction of Regional and Global Temperature for the Past 11,300 Years