c. 4400000 BCE
*Ardipithecus ramidus* and the partial “Ardi” skeleton
Human evolution & hominins · Homininos tempranos · Locomoción en mosaico · Contexto paleoambiental
Fossils of *Ardipithecus ramidus* from Ethiopia, including the partial “Ardi” skeleton, are about 4.4 million years old. Pelvis, foot, and other parts suggest a combination of bipedal activity and climbing; the divergent big toe and reconstruction of crushed bones limit more precise conclusions about locomotion. The faunal context points to a wooded environment, so it does not support a single explanation of bipedalism tied to open savannas.
Precision, calendar, and review
- Start
- year · approximate
- Calendar and convention
- Historical-era years; the source calendar is not identified. No conversion of days is assumed.
- Year zero
- The scale goes from 1 BCE to 1 CE without year zero. Changing era names changes labels only.
- Documentary review
- Date not recorded
Reading the date: point event.
Sources
- humanorigins.si.edu (opens in a new tab)
Source provenance and scope
- Publication date
- Not identified in metadata; document review pending
- Source updated
- 2024-01-03
- Bibliographic date checked
- 2026-09-23
The correspondence between this reference and individual claims has not yet been itemized.
This record is an editorial synthesis. Consult the sources to check claims and their limits. Chronological relationships alone do not establish causation.