Now, it is said that inside a black hole, the properties of time and space switches - wherein space moves forward where one can't go back (like how we are always pushed towards the future in our time axis), and time is stationary (like how space will never move). Thus, if we enter a black hole and hypothetically survive, we will see that time stops and we all move at the speed of light towards the mass singularity in the center - something that we can't stop like how we are always pushed towards the future.

Let us put these properties inside a 3D Cartesian plane. Let x-axis be time and the z and y-axis be 2 dimensional point in space. Based on our current understanding, outside a black hole, our graph will look like a parabolic cone extending from origin or big-bang (0,0,0) to the right -- wherein time extends to infinity and z and y axis showing space slowly expanding as our universe expands. Now inside a black hole, we can say that this graph will be transposed from origin-right parabolic cone to point-down line -- wherein the x-axis time line we all share stops from being a forward moving line and expands in a parabolic cone shape to show all points of past, present and future. And the parabolic cone shaped space becomes a downward moving line towards a singular end point.

After considering these, I came to theorize that we can also learn about something regarding time-space outside the black hole using what we know about the black hole model. If space in a black hole is singular, then there must also be a singularity in time outside of the black hole. In order to find this singularity, it's useful to temporarily consider time as space instead of as time - so we start asking 'where' instead of 'when'. So where is this singularity? Where in time does all past, present and future all becomes one?

The singularity of the past.

We all got the feeling that just yesterday we are all in kinder-garden playing with toys. That it was just like yesterday when we all were just entering Freshman in High school and hitting our head in the wall because of how confusing algebraic equations are. That it wasn't long before when we lost our first tooth or got our first roller coaster ride. Now if we consider this, why does it seem that the past acts like a singularity that catches all our previous presents and futures? Maybe, because it just does.

The singularity of our past might also explain more simply the reason why we can't go back in time. Albert Einstein and Steven Hawking have long theorized the possibility of travelling into the future, but none regarding travelling to the past.

This theory is still a thought in progress. The singularity in our timeline might even be simply the present which encompasses all our historicity and future potential. However, the main point remains that if black-holes have a point of singularity in space, we can safely infer that outside of a black hole, time must have that point of singularity as well.

P.S. Time-Space is just one but we separate them in our discussion to refer to the two Space-Time dominant properties. If anyone is smart enough to apply this theory into a mathematical formula feel free to do so.