Editing Tree house (section)

===Prehistoric hypotheses===
{{See also|Nest-building in primates}} <!-- "Nest-building in primates" links here !-->
All [[great apes]] build tree platforms or [[nests]] as shelter from dangers on the ground, and the habit may have been inherited by [[humans]]. While no evidence of prehistoric human-made tree houses has been found, wooden structures would not have survived over time. In contrast, evidence of cave dwellings, rock shelters, and bonfires is detectable, but is notably scarce from before 40,000 years ago. This has led to the speculative hypothesis that [[archaic humans]] may have lived in trees until then.<ref>Donald R Perry, [https://books.google.com/books?id=fsF1AwAAQBAJ&q=%22tree+houses%22+&pg=PT392  Interpreting evidence: Tree houses], 21st Century Anthropology: A Reference Handbook, SAGE Publications, 2010, page 365-366</ref> The [[Human skeletal changes due to bipedalism|skeletal changes]] due to the [[Bipedalism#Evolution of human bipedalism|evolution of human bipedalism]] started at least four million years ago, but early bipedal [[hominin]]s may still have spent some time in trees and retained some tree-climbing abilities. Early terrestrial bipedalism is supported by evidence such as fossilized bones and footprints (like the [[Laetoli]] footprints). According to the [[savannah hypothesis]], this evolution happened as an effect of early humans adapting to life on the ground in savannah environments, partly for more energy-efficient locomotion.{{cn|date=September 2024}}