Comment on "Quantum bound states with zero binding energy"

Comment on "Quantum Tunneling Beyond Semiclassical Approximation" by R. Banerjee and B. R. Majhi (and many others!)

Comment on "Quasinormal modes in Schwarzschild-de Sitter spacetime: A simple derivation of the level spacing of the frequencies"

Comment on "Relativistic Effects of Light in Moving Media with Extremely Low Group Velocity"

Comment on "Reversed gravitational acceleration...", arXiv:1102.2870v2

Comment on "Ruling out chaos in compact binary systems"

Comment on "Self-dual teleparallel formulation of general relativity and the positive energy theorem" G. Y. Chee

Comment on "Spacetime Information"

Comment on "Spherically symmetric perfect fluid in area-radial coordinates" by Iguchi et al

Comment on "The complete Schwarzschild interior and exterior solution in the harmonic coordinate system" [J. Math. Phys. 39, 6086 (1998)]

Comment on "The Cosmic Time in Terms of the Redshift", by Carmeli et al

Comment on "The double-Kerr solution" by W.B. Bonnor and B.R. Steadman

Comment on "The extremal black hole bomb"

Comment on "The gravitomagnetic influence on gyroscopes and on the lunar orbit"

Comment on "Torsion Cosmology and Accelerating Universe"

Comment on "Uncertainty in measurements of distance"

Comment on "Viscous cosmology in the Kasner metric"

Comment on "What does the Letelier-Gal'tsov metric describe?"

Comment on 'Large-scale non-locality in "doubly special relativity" with an energy-dependent speed of light'

Comment on 'Model-dependence of Shapiro time delay and the "speed of gravity/speed of light" controversy'