starman wrote: nomadski wrote:Ok , I am layman . In plain English , from theoretical perspective , do wormholes exist now ?

Maybe not but there may be alternatives like gravitational field propulsion, advocated by Morrison.

I doubt aliens really need our genes or have a hydridization program. As

*The Alien Plan for Earth* shows, the phenomenon while real is very deceptive.

Based on GR it is routinely asserted that gravity propagates at the speed of light. This is not good enough to be proof.

Nobody has ever actually measured the speed of gravity. Previous papers on the subject have invoked the theory (GR) to

interpret observational measurements leading to a logical circularity. One cannot use a theory to prove itself. Measurements

have to be totally objective and independent.

Galaxy dynamics simulation are done using Newton's equations. Nobody uses GR to do such calculations. GR is not even used to solve

for two and three body problems. Newton's equations are time independent and the speed of gravity is infinite. Considering

the scale of galaxy and multiple galaxy interaction domains, the speed of light would manifest all sorts of "retarded" potential

effects. But nobody does these simulations with weak field limit of GR equations cast with retarded potentials. This smells.

There is actually no reason for "gravitons" (GR does not support such entities since it is not a proper, quantizable field theory)

to have the speed of photons. The scale of the universe is rather consistent with gravitons having a speed much, much larger than

photons. If this is true, then it is conceivable that super-fast warp bubbles can be produced which carry EM entities (spaceships,

humans) much faster than the speed of light. Physical laws are not broken because the space-time bubble in the propagating

warp is intact and not flowing. Ironically, the vacuum GR equation solutions indicate that such space-time bubbles are possible

and can displace the universal space-time in which they are imbedded. We have static solutions that point to such structures. But

I am inferring that transient or stationary solutions of this form exit as well. Non-static solutions are likely not to have

a fully formed event horizon at the interface of these two space-time domains. This is good for the health of humans trying to

use such warp bubbles to travel. In spite of all the nonsense you see in GR textbooks, the event horizon is not some coordinate

singularity, but is an actual physical singularity (an infinite red-shift surface) as can be demonstrated by its invariance under

coordinate transformations. Singular coordinate transforms merely move the event horizon singularity somewhere else. This is not

any proof of it not being a physical singularity. Anyway, all geodesics reach the speed of light at the horizon. Moving massive

objects at the speed of light means E=mc^2 and anti-matter-matter type annihilation.