The climate switched from 41 kyr glacial cycles to 100 kyr cycles about a million years ago. Greenland experienced regular interglacials during the 41 kyr cycle

The climate switched from 41 kyr glacial cycles to 100 kyr cycles about a million years ago. Greenland experienced regular interglacials during the 41 kyr cycles. None of this is surprising except that climate change obsessed scientists, journalists, and HN commenters appear to be unaware of the Marine Isotope Stages. The sediments below the western and eastern Antarctic ice sheets should show similar signs of interglacial activity timed to their own transitions to permanent glaciations.