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Australopithecus africanus: cranium

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Object Details

Discovered by

Robert Broom and John T. Robinson

Is this an original object?

No

Age

Between 2.5 and 2.1 million years old

Summary

STS 5, a nearly complete adult Australopithecus africanus, was an important fossil find because skeptics had previously argued that the Taung Child was actually a baby chimpanzee that would have gained its ape-like features when it got older. This fossil showed that maturity wouldn’t make A. africanus less human. The main difference between STS 5 and the Taung Child is that this fossil's face is strongly prognathic, an ape-like feature that becomes more pronounced as A. africanus individuals grow up.
STS 5 was nicknamed 'Mrs. Ples' by scientist Robert Broom after initially hypothesizing that she was a middle-aged female Plesianthropus transvaalensis, which was the original name of this species---thus, ’Mrs. Ples.’ This skull now thought to have belonged to a male.
Often found alongside animal bones, Australopithecus africanus was once considered a “killer ape.” Now we know that members of this early human species were sometimes eaten by predators. Living together in groups helped these early humans protect themselves.
Why dynamite is not necessarily the best way to excavate human remains.... do you see the wedge-shaped portion of the forehead reconstructed here in a light color? If you follow that crack around to the rear of the skull, you’ll see why scientists are much more careful today when excavating, or digging for human remains. Mrs. Ples’ skull was actually blown into two pieces during its extraction from the breccia (a cement-like rock) because Broom used dynamite to expose the remains over backbreaking work with a pickaxe.

Date of discovery

1947

Original Object Identifier

STS 5

USNM Number

N382192-0

Link to Original Record

ark:/65665/3ad017d8f-fb81-48e9-9ae1-c8dd93d835dc

Original Object Holding Institution

University of the Witwatersrand (South Africa)

Location of Discovery

Sterkfontein, Republic of South Africa

Site

Sterkfontein, Republic of South Africa

Species

Australopithecus africanus

Data Source

NMNH - Anthropology Dept.

Metadata Usage

CC0

Record ID

dpo_3d_200041

Discover More

hominin fossil thumbnail

Hominin Fossils

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