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Knife is a tool that has not been much evolved during since then. In other words, between their cutting tool and our knives today, there is not much difference in its functionality. The main goal of a cutting tool has been well sustained.Our thumbs are finely tuned machines. Though there are no muscles in our thumbs, it is controlled by five hand muscles and three major nerves. About, 25% percent of the motor power of our brain is devoted to the hand, while 4% of our brain's power is dedicated to thumb. In my design, I have tried to allow the thumb to be used more than ever.
M.F.T university of tehran