Evolutionists utilize a theoretical tree of life that takes people, plants, and animals back into deep evolutionary time to an unobserved, unknown, hypothetical last universal common ancestor (LUCA). Whatever this organism was, they maintain, it was the ancestor of all life and evolved in turn from nonliving chemicals.

Woolly mammoths of the Ice Age¹ were once found in huge numbers in Siberia, northern Europe, and North America.