Knowra Ardi Ardi Ardi is a partial skeleton of Ardipithecus ramidus, dated to about 4.4 million years ago and discovered in Ethiopia. Its anatomy provides evidence about early hominin locomotion and the environments in which hominins evolved.
Ardipithecus ramidus : An extinct hominin species that lived in what is now Ethiopia about 4.4 million years ago. Ardi is the partial skeleton that established the species’ anatomy in detail.
Bipedalism : Locomotion using two legs as the primary means of movement. Ardi’s pelvis and lower limbs are central to assessing early forms of this locomotion.
Tim D. White : An American paleoanthropologist known for research on early hominins and fossils from Ethiopia’s Afar region. White co-led the research team that studied and published Ardi’s remains.
Ardipithecus ramidus habitat : The reconstructed environments in which Ardipithecus ramidus lived, based on fossils, sediments, and ancient soils. Ardi’s associated fauna and geology inform competing reconstructions of her surroundings.
Ardi’s hand : The preserved hand bones of Ardi, notable for a grasping big toe and a relatively short, rigid foot. Its structure helps distinguish climbing adaptations from those used in upright walking.
Arboreal locomotion : Movement through trees by climbing, grasping, leaping, or suspending from branches. Ardi retained features associated with tree movement alongside adaptations for bipedalism.
Middle Awash : A region of Ethiopia’s Afar Rift that preserves a long record of human evolution and related environments. Ardi was found during fieldwork in this major fossil-bearing region.
Woodland hypothesis : The proposal that early hominins evolved bipedal adaptations in relatively wooded environments rather than open savanna. Ardi’s reconstructed habitat challenges simple accounts linking bipedalism to grassland expansion.
Ardi’s pelvis : The pelvis of Ardi, reconstructed from crushed and fragmented fossil bones. Its shape has been used to investigate how Ardi moved on two legs.
Grasping hallux : A divergent big toe capable of grasping, found in some primates adapted to climbing. Ardi’s opposable big toe indicates that her foot remained useful for grasping branches.
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