torsional ultrasonic scalpel for use in keyhole surgery (it cuts by transferring high intensity ultrasonic vibration into the body’s soft tissue and speeds coagulation of the blood in case you were curious)
Times New Roman by Pedro Javier Arbelaez. This poster in particular is a favorite of mine. I assume this poster goes through the history of Times New Roman. What's great is that Times New Roman is the only typeface used here.