"The hierarchy problem is hard to explain. ... Basically, the problem is that there are two main energy (or mass) scal…"

"Following 't Hooft, we can formulate a technical definition of naturalness: The smallness of a dimensionless paramete…"

"… what is the wave function? Is it a complete and comprehensive representation of the world? Or do we need additional…"

"What is the empirical content of quantum mechanics? Or how does the wave function assigned to a relate to the results…"

"... was formalized by a number of authors ... as the requirement that the wave function of a multi-electron system is…"

"When you pick the string just right, a higher pitch other than the fretted note is sounded. This higher pitch is an o…"

"There has always been a good deal of mystery surrounding the pinch harmonic, or, as hip players like to call it, “pic…"

"In short, pick squealing, or pinch harmonics is part of the reason why a lot of people started using copious amounts …"

"The way I and most guitarists produce a pinch harmonic is to grasp the pick close to its pointed tip with your thumb …"

"The last few decades have provided abundant evidence for physics beyond the two standard models of particle physics a…"