2. Physics 16: Mechanics and Special Relativity – While the sciences often leave students holed up in the library poring over their work–this one apparently requires extra effort. “The class is so tough that you’ll have to work with everyone else to turn in problem sets,” claims one student reviewer. Taught by Professor Howard Georgi, who, according to another student, “spent his nights in the Leverett dining hall, helping us with the problem sets, going to bed at 2am!” If the coursework keeps even the Professor up late night–it’s definitely not a cakewalk.