“The sun is still the number 1 factor in our energy balance. No matter how much people argue about CO2, they can't successfully explain the pre industrial revolution 900-1300AD Medieval Warming Period or the cold 1645-1715 AD Maunder Sunspot Minimum that coincided with European crop failure, famine and disease while linking it with our modern day issues with CO2 to climate change. Yet sunspots and solar cycles can and do explain both.”

—  Anthony Watts

Anthropogenic Warming? http://web.archive.org/web/20070304183056/http://www.norcalblogs.com/post_scripts/archives/2006/10/anthropogenic_w_1.html#comments, norcalblogs.com, 22 October, 2006.
2006

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American television meteorologist 1958

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“It would seem that Maunder and Sporer were right and that most of the rest of us have been wrong. As is often the case in the onrush of modern science, we had too quickly forgotten the past, forgotten the less-than-perfect pedigree of the sunspot cycle and the fact that it too once came as a surprise. We had adopted a kind of solar uniformitarianism, contending that the modern behavior of the sun represented the normal behavior of the sun over a much longer span of time.”

John A. Eddy (1931–2009) American astronomer

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“It has long been though that the sun is a constant star of regular and repeatable behavior. Measurements of the radiative output, or solar constant, seem to justify the first assumption, and the record of periodicity in sunspot numbers is taken as evidence of the second. Both records, however, sample only the most recent history of the sun.”

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