String theory or Ferent gravitation theory:

In string theory, one of the vibrational states of the string gives rise to the graviton, a closed string, a quantum mechanical particle that carries gravitational force.

In String theory the graviton has the speed less than speed of light, c!

If the String theory is right the black hole can not attract anything, because the escape velocity is higher than c = 3 × 10^8 m/s!

In Ferent gravitation theory:

“I am the first in the world who Understood and Explained the Gravitation with high speed gravitons, v = 1.001762 × 10^17 m/s” 

                                                                                           Adrian Ferent

“The graviton has Negative Impulse, Negative Mass and Negative Energy!”  Adrian Ferent

“I am the first in the world who Understood and Explained that Gravitons with the speed of light, c = 2.9979 × 10^8 m/s, are too Slow to keep the galaxy together and this means Einstein’s general relativity is wrong at galaxy level” Adrian Ferent