Say you headed toward a typical black hole feet first. The gravitational field near a black hole is very strong, and it gets stronger as you get closer to it. This means that the black hole would pull on your feet more than it would pull on your head. In fact, the difference between the force of gravity on your feet and the force of gravity on your head is so big that you would literally be torn apart. You wouldn't survive going into a black hole.

But let's assume you can build some sort of spaceship that will protect you as you head toward a black hole. What will happen? It depends on the type of the black hole. First, however, I should mention that all black holes do have something in common: they all
have a closed surface called an event horizon. Once something, even light, is inside the event horizon, it can never get out.

The simplest kind of black hole is called a Schwarzchild black hole. This type of black hole doesn't rotate or have an electrical charge. With this type of black hole, once you pass the event horizon, you will be unable to avoid the singularity, where everything gets crushed down to a point.

If the black hole has a charge or rotates, you may be able to avoid hitting a singularity, and Einstein's equations admit solutions that could be interpreted as suggesting the possibility of traveling to a "different universe." These are just mathematical solutions
however. We don't know if these solutions really describe reality.

Why wouldn't it make sense to send someone into a black hole to find out what's there?