-Expert
Facts[]
- Fact 1: The oldest known surgical procedure is a trephination, the removal of a piece of bone from a skull. It was performed with primitive tools as early as 5000 B.C.
- Fact 2: Archaeologists discovered a Neolithic grave yard in Mehgrath, Pakistan dating from the time of the Harappans, around 7,500-9,000 years ago, containing 9 adult bodies with a total of 11 teeth that had been drilled.
- Fact 3: The pump drill was invented during Roman times. It consists of a vertical spindle aligned by a piece of horizontal wood and a flywheel to maintain accuracy and momentum.
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