Is there a black hole in the earth ?
No there is no black hole in the Earth. A black hole is not really a hole first of all, it’s a point of infinite density or a gravitational singularity. Any massive body can become a black hole if all of its matter was compressed to within its swarzschild radius. For the Earth this is about 9mm so if the whole planet was compressed inside a circle with radius 9mm it would keep collapsing into a single point making the earth itself a black hole. So you can’t have black holes inside things but anything can become a black hole.
