Climatologist Michael Mann and his colleagues have graphed a thousand-year period (the famous "hockey stick" chart) that shows how __________ were more or less constant until they spiked __________.

Question

Quizplus · Accepted Answer

Michael Mann and his colleagues' "hockey stick" chart shows how global temperatures were more or less constant until they spiked in the past half-century.

Climatologist Michael Mann and His Colleagues Have Graphed a Thousand-Year