We know subtle changes in Earth’s orbit around the Sun are responsible for the comings and goings of the ice ages
Maybe it is also responsible for the coming and goings of more temperate ages as well
Keep in mind that every time you see a mammoth being found under the ice in Siberia - you need to understand that in its pre frost it was grazing on grasslands - not ice.
It turns out that many dinosaur bones have been found in the frozen tundra of the Antarctic. The first were discovered in 1986 by Argentinian geologists Eduardo Olivero and Roberto Scasso, who unearthed remains of an ankylosaur now known as Antarctopelta Oliveroi. These bones were found on James Ross Island, as were bones of a Trinisaura. Other dinosaurs found in Antarctica include those of a Glacialisaurus and the massive carnivore Cryolophosaurus. But it’s not like these dinosaurs were roaming an icy landscape. Antarctica as we know it only formed about 25 million years ago, long after the dinosaurs had gone extinct. Before that, it was part of a supercontinent called Gondwana and was actually quite tropical!
The earth continues to change - just look around you and stop listening to all the propaganda