{ tcb }: damn son, 2000
{ tcb }: negative mass cosmic strings
{ tcb }: covariant derivative
{ tcb }: gravitational time dilation
{ tcb }: quantum gravity
{ tcb }: geodesic
{ tcb }: Ω ~ R x Σ
{ tcb }: traversable wormhole
{ tcb }: hypothetical topological feature of spacetime
{ tcb }: welcome
{ tcb }: discovs
{ tcb }: H H Hank