Scientists have proven the arch running across the top of the human foot evolved in a 3.5-million-year old human ancestor, enabling us to walk and run upright unlike all other primates.
Fossil - Wikipedia
Human evolution - Wikipedia
How old is Earth?
Human Origins and Evolution at the Skulls Exhibit
古生物新闻(2020年2月17日-3月1日) - 知乎
New Insights Into Human Evolution: The Unique Role of Our Foot's Spring-Like Arch
Fossils and ancient DNA paint a vibrant picture of human origins - Century of Science
Australopithecus, Characteristics & Facts
古生物新闻(2020年2月17日-3月1日) - 知乎
Frontiers When and Why Did Human Brains Decrease in Size? A New Change-Point Analysis and Insights From Brain Evolution in Ants
Punishment: 3000-year-old Chinese Foot Amputation May Be Oldest Ever!