To the extent the scientific evidence leads to a particular conclusion, the conclusion is that humans are modestly enhancing a natural warming cycle that fortunately rescued the planet from the Little Ice Age.

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Researchers say this back-from-the-dead trick has implications for how ecosystems recover from the planet's cyclic long periods of ice coverage.

BBC: Centuries-old frozen plants revived

U.S. and global soil moisture improved throughout the 20th century as our planet warmed in its recovery from the Little Ice Age.

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