Black holes could be dangerous to people if people were close to a black hole, but there are no black holes near the planet Earth (as far as we know) and the closest one is probably in the center of the Milky Way galaxy, which is about 80,000 light years from Earth, which is a safe distance.
2010
black holes are
Not much. The closest (known) black hole is at a distance of about 3000 light-years.
There is no evidence that white holes exist.
Not directly. Black holes have only affected people insomuch as they attract. people's attention and that some take time to study them.
Well first of all white holes aren't proven to exist yet so nobody knows if they pose a threat at all. Unlike black holes, white holes repel everything and spit stuff back into space, so they wouldn't really pose a threat unless they spat out a large amount of mass right at the earth.
Yes. Black holes are so massive that nothing, not even light, can escape its path. So that means that even stars and asteroids or much less anything in its path would get sucked up and crushed into absolutely nothing. So yes, there are dangerous.
That's what the mathematical theories suggest would happen. We have never observed this, and with any luck we never will be close enough to see this. Black holes are dangerous places.
They vaporize anything in their path. Well, it stretches so much that all of the particles are separated and sucked into the black hole.
Yes, that is what people believe.
They do not take people to space.
you go to a hole that's black and tell people about it.