They will literally rip each other apart until the stronger one sucks the weaker one in.
you will enter another universe
The two black holes will merge to form a single, larger black hole with a mass equal to the combined masses of the original two.
Black Hole Assault happened in 1992.
Black Hole - comics - happened in 1995.
Impossible.
It disappears forever
Well if it DOES happen and a black hole DOES destroy the Universe, then we won't be around to worry about it.
Objects which approach a black hole will get sucked into it.
Black Hole - video game - happened in 1981.
A black hole can't really form inside of another black hole. If you think of a black hole forming after a star goes supernova, then there isn't really a star to go supernove inside of the already created black hole. In fact, there isn't even any space inside of the blak hole for anything to happen. Two black holes can join together, but they wil eventually go to one.
A black hole does not create a star. A black hole is formed when a star dies.
nothing