Researchers say prehistoric man invented dental drill 9,000 years ago. Below is an experimental reconstruction photos of a probable method for producing the drilled molar crowns found at a 7000-9000 BP Neolithic graveyard in Mehrgarh, Pakistan.(AP Photo/Luca Bondioli, Pigorini Museum, Rome)
![prehistoric man invented dental equipment. this method begins 9000 years ago.](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhlju3NUx5O3jUM7Xed_2DAW5ZZATkEa7jSruNuSXIwUoyV5fysDKFiNSyhscfmS7A_cbGtzp0NQohC-4S1dIKyxu_t3PRKNrLfLTEhUiR0tw03raVhS2DXSP50JxVYrndkKoouHCtB4Eg9/s400/dental1.jpg)
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