Evidence indicates humans' early tree-dwelling ancestors were also bipedal. Summary: Experiments by anthropologists show that fossil footprints made 3.6 million years ago are the earliest direct evidence of early hominids using the kind of efficient, upright posture and gait now seen in modern humans.

Did humans used to live in trees?

Early human ancestors stopped swinging in trees and started walking on the ground sometime between 4.2 and 3.5 million years ago, according to a new study. The former species is 600,000 years older than the latter and is believed to be its ancestor. ...

Did early humans live in trees?

Early human ancestors probably continued to sleep in trees until about two million years ago, Dr. Samson said. By 1.8 million years ago, new hominins like Homo erectus had left the trees.