Consciousness implies much more than Nervous system or brain or neurons. The centuries have passed and we have all had time to think about the many great minds that have pondered, collaborated and concluded through reasoning – what the consciousness of Humans and the Earth ultimately means to us all.
We can all concur that Consciousness is mostly mysterious in the science world but well thought of and written about in the philosophy (Love of Wisdom) world.
Here is an unknown tidbit for all readers, about consciousness. It is directly related to your Heart. Your Heart runs your entire reality including your Being within Consciousness.