When the Antarctic was somewhat warmer than it is now

At www.sci-news.com/othersciences/paleoclimatology/article00417.html … not so long ago, just a mere 15 to 20 million years ago, temperatures were some eleven degrees celsius warmer than today. Not enough to go skinny dipping but enough to get climate scientists hot and bothered. The climate in the mid-Miocene was warmer and wetter than it is nowadays and paleoclimatologists think this is evidence of global warming all those many years ago – but is it? Have they explored the possibility there could have been a shift of the poles – not a great deal to get from icy conditions to a little warmer than the tundra, but enough to matter. Perhaps.