we are exiting the ice age (Pleistocene Ice Age), so it's not THAT surprising, what's surprising is the pace, it's going faster than expected
> Like all the others, the most recent ice age brought a series of glacial advances and retreats. In fact, we are technically still in an ice age. We’re just living out our lives during an interglacial.
https://www.climate.gov/news-features/climate-qa/whats-colde...