Sitting in the reclining chair during my last visit to dentist, I stared very intently at the drill that the dentist was about to use in my mouth. I started tensing up as I anticipated the high pitched shrill sound that would accompany the grinding of the dental drill against my teeth. I remembered that those drills could be made out steel with a tungsten carbide coat, or even worse, a diamonds coating.
String theory has seen better days. Once hailed as the most promising theory with perhaps a Theory of Everything just around the corner, it has recently been publicly criticized by several physicists as a potential dead end. Is string theory really hanging on by a thread? Or is it still tightly woven into mainstream physics?