__________ first appeared at a time of constant long-term climatic change, reflected in the Northern Hemisphere by long glacial periods separated by shorter warmer intervals.

Question

Quizplus · Accepted Answer

Modern humans first appeared during the Pleistocene epoch, which was characterized by frequent and dramatic shifts in global climate, including the long glacial periods mentioned in the question. These fluctuations likely played a role in the evolution of our species and the development of adaptive traits such as bipedalism and larger brains. Non-human species such as Asians, Europeans, and Africans also existed during this time, but the question specifically refers to modern humans.

__________ First Appeared at a Time of Constant Long-Term Climatic