>>40725675The KT extinction was comparatively slow, even factoring in the bollide impact. It didn't just blanket the world in a shockwave and wipe out the dinosaurs; it was a big cascade of factors including gradual ocean acidification.
As an ecologist by trade, I'm in agreement with you; our ecosystems are supposed to change. The problem is the change is occuring too rapidly and so we're going to lose a lot more species than if it was happening normally. Humans already wiped out a bunch of our planet's Pleistocene megafauna which were integral in upholding ecosystems due to their roles as keystone species. It's a cascade and it snowballs from there. See pic related.
There's also the fact that previous glaciations occur on a roughly 40,000 year cycle with only slight deviation. The last glacial maximum was 20,000 years ago, so we would expect things to begin cooling down again now, not warming up.
