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xkcd : Earth Temperature Timeline
(imgs.xkcd.com)
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Climate
Because I can already hear the anti-man-made-climate-change crowd shrieking... how do we go about determining global temperatures thousands of years ago?
Edit: Stopped being lazy and googled it: https://gizmodo.com/how-do-scientists-know-what-the-temperature-was-thousan-1714597561
Very informative but you see, science doesn't convince the anti-science crowd, pretty much by definition.
Yup, but if I'm talking to someone who doesn't believe in man-made climate change and I show them the xkcd and answer their obvious follow-up question about how we know past temperature, and they STILL don't want to listen to me... well then I know I can never talk to that person again. :)
Too bad the anti-science crowd are our elected officials. ༎ຶ‿༎ຶ