You may be right that I overstated that. In 2013 there was a study finding it had not changed this rapidly in 65 million years, though since then there have been studies suggesting there may have been incidents of very rapid change in the distant past. Here are some relevant links I found:
You may be right that I overstated that. In 2013 there was a study finding it had not changed this rapidly in 65 million years, though since then there have been studies suggesting there may have been incidents of very rapid change in the distant past. Here are some relevant links I found:
Studies of ice cores suggest climate change today is more rapid than in the past 800,000 years
The same ice core data, with sources
Climate change occurring ten times faster than at any time in past 65 million years
Today’s Climate Change Proves Much Faster Than Changes in Past 65 Million Years
Abrupt climate changes in Earth history
Rates of ancient climate change may be underestimated
Rapid climate change: lessons from the recent geological past