@IA, first welcome to CCF. Second, while you are waiting for our experts to weigh in, consider using the search CCF function to look at old threads. I have found a number of these educational and you may as well. Here is just one to get you started (I used QI and knife as the keywords in my search).
"It certainly strikes the beholder with astonishment, to perceive what vast difficulties can be overcome by the pigmy arms of little mortal man, aided by science and directed by superior skill." --Henry VIII