String theory is the trendy pursuit for the physicists in my field. It's untestable and, as famously put, "not even wrong." While it's done some great things for the mathematicians, it's lead entire generations of physicists to pursue it with very little to show for it. Expect more about string theory in this journal as well as related topics to physics.
I have a theory that it's impossible to prove anything, but I can't prove it.