how energy cannot be created or destroyedEnergy can neither be created nor be destroyed ? So how the energy came into being ?
Energy can be transformed from one form to another form, so at the singularity of big bang there were create enormous amount of energy and that energy covert into mass then that energy came into species.
One thing that everybody forgets is that the laws of physics only apply under certain circumstances. The laws of physics including Newton, Einstein and quantum mechanics break down before the first microsecond of the big bang. This means that energy and matter do not need to be conserved. They can spring up out of nothingness. F does not equal ma. The speed of light is not the same as the speed of light today. We have a hard time grasping this since we want to explain things with what we know. A great physicist thinks "outside the box". Newton thought "outside the box". Einstein certainly thought "outside the box". Only those who are brave enough to put aside their preconceived notions of physics will be able to develop the theory as to where the original singularity came from.