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American Focus > Blog > Tech and Science > Shallow Holes in Our Ancestor’s Teeth Might Not Be a Disease as Thought : ScienceAlert
Tech and Science

Shallow Holes in Our Ancestor’s Teeth Might Not Be a Disease as Thought : ScienceAlert

Last updated: June 10, 2025 1:40 am
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Shallow Holes in Our Ancestor’s Teeth Might Not Be a Disease as Thought : ScienceAlert
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The enamel that covers our teeth is not just a protective layer – it also holds clues about our evolutionary history. A recent study published in the Journal of Human Evolution sheds light on a unique aspect of enamel: its absence.

Researchers have identified tiny, shallow pits in fossil teeth that may have significant evolutionary implications. These pits were first observed in Paranthropus robustus, a close relative of the Homo genus. What’s interesting is that these pits are consistent in shape and size, appearing uniformly circular and shallow.

While these pits were initially thought to be signs of malnutrition or disease, further research has shown that they are present in other Paranthropus species as well as some Australopithecus individuals. This suggests that these pits may have a deeper evolutionary significance.

The study analyzed fossil teeth from hominins in the Omo Valley in Ethiopia, spanning over two million years of human evolution. Interestingly, the uniform pitting was consistently present in Paranthropus and early Australopithecus teeth, but absent in southern Africa Australopithecus and Homo teeth.

These pits do not appear to be caused by stress or disease, as they do not correlate with tooth size or enamel thickness. Instead, the researchers propose that the pitting may have a genetic or developmental origin, possibly serving some unknown functional purpose.

Comparisons with a rare condition in modern humans called amelogenesis imperfecta support the idea of a genetic basis for the pits. This suggests that the uniform pitting may be a heritable trait rather than a harmful disorder.

The presence of these pits could serve as a new marker for tracing evolutionary relationships among fossil hominins. By studying subtle tooth features like enamel thickness and wear patterns, researchers can gain insights into the evolutionary history of different hominin species.

See also  Clinical trial finds three new ways to treat drug-resistant tuberculosis

Overall, this research offers a new tool for understanding the relationships between our ancient relatives and shedding light on the evolutionary paths they followed. The findings highlight the importance of dental features in unraveling the mysteries of human evolution.

TAGGED:AncestorsdiseaseholesScienceAlertShallowteeththought
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