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Irhoud 3

Jebel tooth fragment with photomicrograph inset
Irhoud 3
Exhibit Item
Site: Jebel Irhoud, Morocco
Year of Discovery: 1961
Discovered by: Mohammed Ben Fatmi
Age: About 160,000 years old
Species: Homo sapiens

Longer childhood and adolescence

As teeth develop, new enamel layers form daily. Scientists used CT-scanning to count the enamel layers on the 160,000 year old teeth of a 7-8 year old Homo sapiens child found at Jebel Irhoud, Morocco. The layers show that the teeth were growing and erupting at the same rate as those of seven- to eight-year-old children today, telling us that this fossil human child was growing at the same rate as living humans.

Page last updated: March 30, 2016