Sinkholes continue to be a mysterious problem all over the world, but seldom do they strike in places where they get this kind of attention. The National Corvette Museum suffered some serious issues after a sinkhole collapsed part of the building. These sinkholes are happening more and more frequently and in quite a widespread geographic area. The theories about why this is becoming such a problem are all over the place, from changes in the magnetic field to fracking to HAARP. What do you think?