Taung Child Is at Least 2.962 Million Years Old, New Dating Finds

Gabriele A. Macho of Vrije Universiteit Brussel and colleagues have put a minimum age of 2.962 million years on the Taung child, the fossil skull found in South Africa in 1924 that gave Australopithecus africanus its name. Their result, published Nov. 5, 2026, in npj Palaeoecosystems, is a floor rather than an age.

Southern Africa has none of the volcanic ash layers that date fossils in eastern Africa, and published estimates for the Taung child run from 942,000 years to 3.03 million. The authors say the floor places the skull firmly in the Pliocene. Combining it with a maximum age from earlier work on reversals of Earth's magnetic field narrows the fossil's age to between 2.96 million and 3.03 million years.

The age was measured not on the skull but on a flowstone, a sheet of calcite left by flowing water, above the deposit the skull came from. The clock is the decay of uranium-235, which the paper says avoids a correction that earlier flowstone dating needed. The authors write that both of their uranium dates are minimum estimates if the rock took up uranium after it formed, and that they adopt the older one as the best lower limit. A radiometric upper age constraint, the paper reports, "remains unavailable despite additional drilling and screening efforts".

The authors also re-examined the fossil's tooth and brain development and the shape of the boundary between enamel and dentine in its first molar, and their abstract concludes: "These analyses confirm that A. africanus is a poorly defined taxon." Taung is the only specimen they treat as unquestionably A. africanus, and they report that the fossils usually grouped with it do not cluster consistently.

The authors go on to propose an explanation for the variety of early human relatives in southern Africa: populations that tracked shifting rainfall belts and interbred where they met, rather than one unusually variable species. The paper notes that the skull's exact position in the quarry was lost during mining, one reason dating it from nearby animal fossils has stayed insecure.