evidence: Ian Plimer, a former mining geologist who has previously made unsupported claims about climate change, recently claimed "we have been cooling down for about the past 4000 years", implying that this somehow contradicted what scientists know about recent global warming. In the video, Plimer falsely claims that there has been no change in temperature over the past 38 years, in direct contradiction to available data (see Figure 2). Plimer also claims that the global temperature has been cooling since the "medieval warming", which he can only conclude by ignoring any data after the 1850s; this claim has previously been debunked on Science Feedback. Figure 3 shows that current temperature increase is happening at higher rates than past changes in climate over the last 2,000 years. [...] In summary, Plimer cherry-picks one old dataset that is a proxy for the temperature at a single point in Greenland to falsely imply that the Earth as a whole has cooled since the ‘medieval warming’ or the past 4000 years. When scientists reconstruct Earth’s surface temperature, they show that global temperatures have warmed rapidly over the past century, largely exceeding the slow and local temperature variations during the ‘medieval warming’ or the little ice age.