Final answer:
North Myrtle during the last ice age would have had a much colder climate with continental ice sheets influencing the landscape, and megafauna like woolly mammoths that have since become extinct. Geological evidence indicates these glaciers receded about 12,000 years ago.
Step-by-step explanation:
During the last ice age, North Myrtle and Northern Hemisphere regions would have looked vastly different compared to today. The Quaternary glaciation, which is the most recent period of glaciation, saw large expanses of land covered by continental ice sheets.
North Myrtle, along with other areas at similar latitudes, would likely have experienced much colder climates, affecting local flora and fauna. The animal life that thrived during this time, such as woolly mammoths and other megafauna, was well-adapted to these cold conditions but eventually faced challenges due to habitat changes and potentially human hunting pressures.
Geological studies have shown evidence of glacial advances and retreats, with the last such retreat occurring about 12,000 years ago. This had a pronounced effect on the topography and ecological diversity of these regions.