> We know that the Earth has had at least five major ice ages. The first one happened about 2 billion years ago and lasted about 300 million years. The most recent one started about 2.6 million years ago, and in fact, we are still technically in it.

https://www.space.com/ice-ages-on-earth-could-humans-survive

Ice age are properly defined as periods of "extensive ice sheets" at the poles, contrasted with "greenhouse periods" of no polar ice sheets (or glaciers).

Ice ages are comprised of glacial and interglacial periods. The Last Glacial Period is... a glacial period. We're currently in an interglacial. But still an ice age, since there's ice at the poles (for now anyway).

Thanks for the info. I was just using ice age in the same way the parent was. Glacial Period is more technically correct.