An event horizon, or the point of no return, is only a byproduct of the bending of space. However, electricity and magnetism, by themselves, have no event horizon. It gets complicated, however, if a black hole has charge, and then this new solution does have an event horizon.

The river of time may fork into rivers, in which case you have a parallel reality and so then you can become a time traveler and not have to worry about causing a time paradox.

In general, the larger the breeding population, the slower the rate of evolution.

Until computers and robots make quantum advances, they basically remain adding machines: capable only of doing things in which all the variables are controlled and predictable. Robots are bad at pattern recognition and certainly at common sense. That's why computers can beat humans in chess but can't have even a basic conversation with a six-year-old.

You cannot create new science unless you realise where the old science leaves off and new science begins, and science fiction forces us to confront this.

I agree, along with Carl Sagan, that we should eventually become a two planet species. Life is too precious to place on a single planet.

They basically ask their engineers to volunteer some probability figures, then they take the average. This is not science. This is voodoo.