One more nail in the proverbial death coffin of String Theories - the M version in particular. The Inflationary Theory always was considered a hack at best and now its foundational assumptions are shaken to the core.<p>Undergraduate engineering students are drilled extensively on units and unit conversion exercise for a good reason; ie their designs must work in the real world. Confusing mass, energy, length and time, no matter how fancy of a mathematical theory prescribes it, is a disaster waiting to happen.