«Air temperature influenced African glacial movements at height of last ice age.» (sciencedaily.com)
Even when sea levels were at their lowest, about 22,000 years ago at the height of the last ice age, the islands were likely out of the deer's swimming range. (sciencemag.org)
In fact, we only know of one recent extinction with no human involvement — a species of spruce, Picea critchfieldii, which was common in the lower Mississippi valley at the height of the last ice age but died out 12,000 years ago (Proceedings of the National Academy of Sciences, vol 96, p 13847). (newscientist.com)