ACTON, Australia, Sept. 30 (UPI) --Scientists believe a 400 million-year-old fish fossil holds clues to the evolutionary origins of human teeth. Upon excavation, it wasn't clear whether the ancient ...
Teeth are composites of mineral and protein, with a bulk of bony dentin that is highly porous. This structure allows teeth to be both strong and sensitive. Besides calcium and phosphate, teeth contain ...
The origin of teeth in the evolutionary mystery of the world’s animal timeline is very much a mystery. We know animals haven’t had teeth since the dawn of time, but what we don’t know exactly when ...
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