8000 years is perhaps half way back to the migration of humans from Asia across the Bering land bridge into North America. That migration took place at the height of the last glaciation when ice sheets a mile thick sprawled over lattitudes as far south as Michigan and Wisconsin where I am currently typing this. That glaciation ended ~12000 years ago. So those sandals were as far removed from the ice as we are from the building of the pyramids. BTW that glaciation was just one of about fifteen that have engulfed the Earth in the past 1.5 million years. Each lasts about 100000 years and each has been interrupted by about 10000 years of relative warmth. The next one is not quit