The Claim
The reduction in buccal microwear scratch density observed from Homo antecessor to Homo heidelbergensis and Neanderthals indicates a dietary shift toward less abrasive foods, potentially associated with the development of advanced stone tools or the use of fire for cooking.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Fossil teeth from early human ancestors show fewer scratches over time, suggesting their diets became softer, possibly because they started using better stone tools or cooking food with fire.
See the scientific wording
The reduction in buccal microwear scratch density from Homo antecessor to Homo heidelbergensis and Neanderthals suggests a shift toward less abrasive diets, potentially linked to improved food processing technologies such as more advanced stone tools or the eventual use of fire for cooking.
When food is softened or cleaned of grit before eating—through tools or heat—the particles that scrape against teeth during chewing become fewer and less harsh. This means the enamel on the outer surfaces of back teeth gets fewer scratches over time, because the forces acting on them are smaller and less frequent.
What the research says
1 studyStudy: The diet of the first Europeans from Atapuerca
Scientists found that older human ancestors had more scratches on their teeth, meaning they ate tougher, grittier food. Later humans had fewer scratches, suggesting they ate softer food—maybe because they started using better tools or cooking.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.