Can a matter-dominated model with constant bulk viscosity drive the accelerated expansion of the universe?

Can a Particle's Velocity Exceed the Speed of Light in Empty Space?

Can a primordial black hole or wormhole grow as fast as the universe?

Can a self-gravitating thin cosmic string obey the Nambu-Goto dynamics ?

Can a Unruh Detector Feel a Cosmic String?

Can a wormhole supported by only small amounts of exotic matter really be traversable?

Can accretion disk properties distinguish gravastars from black holes?

Can accretion disk properties observationally distinguish black holes from naked singularities?

Can an astrophysical black hole have a topologically non-trivial event horizon?

Can an observer really catch up with light

Can be gravitational waves markers for an extra-dimension?

Can Black Hole be Created at the Birth of the Universe?

Can black holes be torn up by phantom dark energy in cyclic cosmology?

Can Black Holes Decay to Naked Singularities?

Can black holes exist in an accelerating universe?

Can Brans-Dicke scalar field account for dark energy and dark matter?

Can causal dynamical triangulations probe factor-ordering issues?

Can conventional forces really explain the anomalous acceleration of Pioneer 10/11 ?

Can cosmological perturbations produce early universe vorticity?

Can electro-magnetic field, anisotropic source and varying $Λ$ be sufficient to produce wormhole spacetime ?