From about A.D. 950 to 1250, the North Atlantic region of the globe experienced a period of higher-than-normal temperatures. Known as the Medieval Warm Period (MWP), it was a time in which crops could grow much further north than is now common and oceanic ice did not come as far south. Eventually the warming was reversed, and the world was plunged into the equally long Little Ice Age (LIA), lasting from about 1400 to 1700.
This turn of events — significant warming in the pre-industrial period that corrected itself — would seem to present a problem for the theory of manmade global warming, which asserts that the Earth’s present alleged warming trend is primarily, if not solely, the result of human activity, specifically carbon dioxide emissions, and that it cannot be stopped absent a return to a pre-industrial world.
Global-warming believers such as the Intergovernmental Panel on Climate Change (IPCC) have circumvented the inconvenient truths of MWP and LIA by claiming that both were strictly local events not reflective of global climate in general. Thus, they can then argue that carbon emissions, not cyclical climate changes, are the cause of the current, supposedly unprecedented phenomenon of rising global temperatures.
Not anymore. A team of scientists led by Syracuse University geochemist Zunli Lu has discovered that the MWP and LIA reached all the way to Antarctica — in other words, over the entire world.
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