Learn from four remarkable professors in this set of One Day University presentations on history's great geniuses. It may be true that everyone is born with equal potential, however there are some people who develop a level of ability or skill that defies belief, and display the characteristics of a genius. A genius is defined as a person who has remarkable intellectual or creative function, or other natural ability. So, what exactly makes a genius? And what common characteristics do they share? To find out, we're taking an in-depth look at five geniuses.