> > 20mln years ago the sun was around 0,2% colder > Do you have a source on that? It's not solar radiation forcing that has made things relatively cooler, bu

> > 20mln years ago the sun was around 0,2% colder > Do you have a source on that? It's not solar radiation forcing that has made things relatively cooler, but it is cooler than 20M years ago. Of course, we could actually reach those temperatures again soon. https://environmental-geology-dev.pressbooks.tru.ca/chapter/changes-in-solar-output-and-in-the-earths-atmosphere/ https://environmental-geology-dev.pressbooks.tru.ca/chapter/... See fig 3.1.2. "The present rate of solar warming is about 8% every billion years. That’s 0.008% every million years or 0.0000008% every century."