What is time ? Such an elementary question isn't it ? Time one thing that every human being on this planet share. I don't think there will be any language that doesn't have a word for time. We have an intuitive understanding of time as something that moves in one direction at an assumed uniform speed and we have no choice but to move forward with it. If you were to try and explain what is time more specifically, you would find it extremely hard because there is nothing else like it in our sphere of experience. Time is time, you don't have other words can break that down anymore. In science till the time of Einstein and Lorentz, time was assumed an invariant and absolute quantity, meaning that it 'flowed' past at a uniform rate and which was shared by everyone. Think of a cosmic network of clocks with everyone or at each point in space, set to the same time and time moving forward at the same rate for everyone so that their clocks would agree at any point. T...
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