The San Francisco bay area sits along major fault lines and thus runs the risk of suffering devastating consequences should it ever get hit by a monster-sized earthquake. But the problem isn't necessarily that earthquakes are increasing in frequency or size. In fact, says Colin Stark, Lamont Associate Research Professor at the Lamont-Doherty Earth Observatory of Columbia University, the problem is that we prefer to keep believing the dice will fall in our favor and so we keep building. "Megacities across the world continue to grow, and many are along major faults. Most of these faults have not generated giant earthquakes in recent memory, but historical and geological records, supported by abundant geophysical data, show they do so every few hundred years," he wrote in an op-ed piece for CNN.com.