We are still in the tail end of the last Ice Age 2.6 million years ago because Greenland, Arctic, and Antarctic ice sheets still exist

An ice age is a period of long-term reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Within a long-term ice age, individual pulses of cold climate are termed "glacial periods" (or alternatively "glacials" or "glaciations" or colloquially as "ice age"), and intermittent warm periods are called "interglacials". In the terminology of glaciology, ice age implies the presence of extensive ice sheets in both northern and southern hemispheres.^[1] By this definition, we are in an interglacial period—the Holocene—of the ice age that began 2.6 million years ago at the start of the Pleistocene epoch, because the Greenland, Arctic, and Antarctic ice sheets still exist.^{[2]
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Ice age - Wikipedia

 

So, did our people who had space ships leave 2.6 million years ago because they didn't want to freeze to death? This would explain a lot and how some of us survived even this last 2.6 million years in some form or another?

So, will our ancestors be coming back here soon and are these the space ships we have been seeing since the 1940s since the Ice Age is now towards the end those ancestors who have gone on evolving those 2.6 million years on other planets who might not have ice ages that kills most people?