Zoology 10th Edition by Stephen Miller,John Harley

Exercise 4

Ancestral primates evolved from arboreal ancestors. The family Hominidae includes the hominin lineage, represented today by chimpanzees and humans. Global cooling about 20 mya resulted in the expansion of savannahs in Africa. African apes moved from arboreal habitats to terrestrial habitats. Bipedal locomotion evolved as an adaptation for life in the savannah and at the forest edge. Early hominin evolution began about 7 mya. The genus Homo first appeared about 2.4 mya, and our species arose 195,000 years ago. Changing human cultures over the last 30,000 years have resulted in agricultural innovations, metallurgy, the Industrial Revolution, and a genetic revolution.
How were the evolutionary events that occurred early in the human lineage different from the "evolutionary" events of the last 30,000 years?