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How old was Turkana Boy when he died?

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Side-view illustration of a Homo erectus individual, depicted with a robust, upright body covered in hair, walking with one arm bent. A scale bar beside the figure shows measurements in inches and centimeters. — Homo erectus Artist's rendering of *Homo erectus*, which lived from approximately 1,700,000 to 200,000 years ago.

The fossilized skeleton known as Turkana Boy (KNM-WT 15000), an example of Homo erectus (or H. ergaster), is estimated to have been between 11 and 13 years old at the time of his death. This assessment is based on the maturity of his teeth and limb bones.12