Click image to read a sample and order.

If the hypothesis of the impact is correct (and I am very impressed with the data) it is perhaps the most important hypothesis in the Earth Sciences, with ramifications in other fields, since plate tectonics. This is particularly so for its consequences on the history of peoples over the last 12,800 years.

Professor Edward Keller UCSB
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A sobering and scary (and fascinating) book--a look at where we're going if we don't quickly get our act together. And it's replete with clues about how we could indeed make the changes that would make this fiction, not prophecy.

Bill McKibben
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Click chart to download
Powell, J. (2020). Scientists Unanimous on Anthropogenic Global Warming in 2019. Bulletin of Science, Technology & Society. https://doi.org/10.1177/0270467619886266
The article is free to download or read online.
See Methodology.

Original Survey from November 2019
Powell, J. (2019). Scientists Reach 100% Consensus on Anthropogenic Global Warming. Bulletin of Science, Technology & Society. https://doi.org/10.1177/0270467619886266
The article is free to download or read online.
See Methodology.

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