The following link addresses changes to the subject phenonena: https://climate.nasa.gov/news/2805/scientists-id-three-causes-of-earths-spin-axis-drift/
Questions that come to mind: * Will wholesale extraction of nuclear spin angular momentum from non-isotropic nuclear spin sources—i.e., spin in a favored direction---lead to decreased (or increased) axis drift of the earth? * What about Antarctica’s rebound and ice cap melting? * What about the additional Earth bulge caused by more water from melting ice or shifts of material masses via north south ocean currents causing permanent increased angular momenta? * What about comet impacts like the one that caused the Hiawatha Crater in Greenland about 13,000 years ago? * Was the Hiawatha event responsible for the Younger Dryas cooling and subsequent climate warming? The last bullet is addressed by the following link: https://watermark.silverchair.com/383.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAAiMwggIfBgkqhkiG9w0BBwagggIQMIICDAIBADCCAgUGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMKz7sqBNNwq6QTncsAgEQgIIB1jJ88Zm5CdjGISoqjzd7XXFdOVQYgRcTeFsBA0fLgGRPHWPqZ46N6qzD3V3LJhgdzEeeQtZLpEtMpVC_60iVqFX4vU6oVLRYNvt0XHJTFlWIDL3OFH9ERBo9rW--iHQDv5v6GfRlQaYXAR77ewYVWhGBeAPHYtehS8pyWfsYZMuB-9AqNBiI3-wbvKRdU3vLuFaEC1Rk9PXPm2VyS7nyw6pFkXHi8ZzzKx-DPrJXPMLCmznMkv0JpG9vNInOkBrTMbyBcFkD0pvBROBI8M_UfXGApLEGG_jAI3p4G1dKT8ABfNavQBG-yKLHHeeYMZJ3wgRtDiktApmXrFjeNijpEk9zeWG0IznJI-x4e0TulEV657Pi4tmv5j-UbmeRXNHZqifL3GMLN7dtuGJIghYVDgKhQVNiB6S_jxWZYfNPllruNwYUkMapqZjRTZFDjtQ0jteILxD3ekW-c6ux9-h0ee7oebQiOmm8mDNvErmmTkfYw64NBRtzF8iKbC6ZPY10RrnlQE9d-jI6_j9pUiuM0JfA62bfDLD9XuVu5S_Li5N-fF6wzbGHWMbrq3eKbGsCQ6sm1K5CTZ08BVKvVHegYdBxYMyKEmwLy-419Dp9uc0ZbfjWHir3 Finally, has the change in the Earth’s angular momenta decreased the length of an earth day more than a second from its beginning 4.5 billion orbital cycles ago? If so how many seconds and at what times since then did step changes occur? Bob Cook
