Well, history tells us of prior coastlines in the northern hemisphere being further inland during the Medieval Warm Period (topping out roughly 700 to 800 years ago). That corresponds with multiple research studies on Antarctica (read: southern hemisphere) that temps were warmer there too during the Medieval Warm Period. But they science denying Dims want us to believe our Modern Warm Period is hotter than ever and somehow unprecedented.
And the Medieval Warm Period is just one of many prior warm periods hotter than today's Modern Warm Period.
That chart needs to be shared repeatedly .
It says it all. “Experts” are making these huge judgements with a tiny slice of data.
And in my opinion that “data” is hugely skewed. Any warming may just be simply from building heat emitting roads and house roofs near temperature measuring stations over the years . The heat island effect.