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COMPREHENSIVE INTERACTIVE REPORT · High

Australopithecus afarensis

Lucy’s species3.9–2.9 million years ago · Eastern Africa
Interpretive portrait of Australopithecus afarensis

Current synthesis

One of the best-sampled early hominins, represented by Lucy, the Dikika child, numerous jaws and the Laetoli footprints.

01

Anatomy

Habitual biped with long arms, curved finger bones, a small brain and a mixed terrestrial–arboreal body plan.

02

Ecology & food

Occupied changing woodland, bushland and grassland mosaics.

03

Technology

Possible associations with very early butchery remain debated; no exclusive industry.

04

Clothing evidence

No archaeological evidence of clothing. Reconstruction is shown without garments.

05

Behavior & social evidence

Footprints and juvenile remains offer limited clues to group movement and development.

06

Relationships

A plausible ancestral-grade population near later Australopithecus, Paranthropus and Homo branches.

07

Controversies

How much climbing persisted and whether all regional variation belongs to one species.

08

What reaches forward

Provides the clearest early demonstration that upright walking preceded large brains.

SOURCE DESK

Verify the record.

Smithsonian species evidence ↗Laetoli footprints ↗Research update · 10.1038/s41586-025-09390-4 ↗
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