Gravity News

YES

YES

NO

Before 2036

Before 2034

Before 2038

Before 2032

Before 2030

Before 2028

YES

NO

The universe obeys the "DeWitt boundary condition" which requires the wavefunctions to vanish at singularities.

(Some) singular solutions are replaced by non-singular bouncing solutions.

(Some) singular solutions are replaced by singular bouncing solutions.

(Some) singularities are resolved by wormholes/topology changes.

Singularities prevented by general relativistic time dilation approaching infinity

Modified gravitational action (as opposed to Einstein-Hilbert action) prevents singular solutions.

Spacetime is fundamentally discrete, and the discrete structure does not contain singularity.

NO

YES

String Theory/M-Theory (replacing point particles with extended objects in higher dimensions)

Other

No opinion

Gravity is not quantum

Hořava–Lifshitz Gravity (breaking speed of light limit at high energies)

Causal Sets (Discrete spacetime atoms, only connected by causal relations)

Causal Dynamical Triangulations (gluing triangulated space in layers of time)

Loop Quantum Gravity (quantizing areas and volumes in spacetime)

Gravitational path integral of metric field

Gravitational path integral of gauge variables (e.g., spinfoam models)

Causal set

AdS/CFT

Canonical loop quantum gravity

Quantum geometrodynamics

YES