The black holes

These things were discovered by a very special scientist, a physic scientist named Stephen Hawkins, the different thing is that the only parts of his body that he cans moving are his eyes and one finger. He cans to talk through a computer operated with the only finger that he cans to move.
In the ’80 he published an article about these things, the “the black holes”, a big volume of mass in middle of the universe in a little area making it very dense. The black holes characteristics are that the particles in side it are moving in light velocity, making them travel on the time, and every particle that be close form the black hole would be absorbed, but, if any particle could to stay around this, that particle would travel on the time though a warm tunnel and arrive in the same place in a future or past time…now, here we have what he calls “the crazy scientist paradox”, an explanation very simple about why we still don’t have a time machine: a scientist has a time machine, and he wants to travel 5 minutes in the past and kills himself to prove his theory, now, assuming that he travels in the time, and he kills himself, How is he going to travel to the past if he is death in that moment, therefore he can’t to travel to a past time to killing himself?