Maybe they know sources like these:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Geologic_temperature_record" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Geologic_temperature_record</a><p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Geologic_temperature_record#&#x2F;media&#x2F;File:All_palaeotemps.svg" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Geologic_temperature_record#&#x2F;m...</a><p>and are still trying to fit a regression line showing any kind of global warming...