Human civilization, like you and I, have always sought to understand our surrounding. Understandably, knowing the surrounding is important for us because it is the only means to ensuring our survival. Presence of food, mates and threats, which are vital component of survival are available to us through the immediate environment; but the universe is much more complex than just food, mate and threats.
Two basic component of this universe as we understand today through scientific exploration are "Space-time frames" and "matter".
Here we must admit that although time and space appear to be two distinct entities for human observations, it is now an established scientific truth that time and space are two facets of same entity now called space-time continuum.
How time or space is formed and what are their constituents are unknown in the science literature yet, what is known is that presence of matter changes the structure of space-time fabrics, it literally shrinks the space-time fabrics, which we perceive as gravity.
So next time when someone asks you what gravity is don't say " it is a pulling force exerted by a body with certain mass on another body with mass"-this definition is long outdated.
What you should say instead is "it is a change in the structure of space-time fabric brought about by presence of matter".
Matter is anything that has weight and occupies space.
Human body is made up of matter and has very negligible influence on the space-time fabric.
Our brain constructs the world for us, actually there is no light, sound, time or sensation if we have no brain.
In next article we will look into the " power of our own mind"