Sidharth Bharatwaj's Key Ideas from The Science of Interstellar
by Kip Thorne

After an object crosses the event horizon of a Black Hole, it is considered the point of no return because there is quite literally no escape. Not even for a PHOTON.

But what REALLY goes on in the Singularity? Although a concrete answer cannot be given, the common consensus is that the object will be spaghettified or stretched out past the point of recognition.

After the spaghettification stage, there really is no way of telling.For all we know, the singularity could be a miniscule that leads into another, SEPERATE universe.

Let your imaginations run wild.