“Somehow I had to send myself back in time, to open out the memories and see what they had to offer”

Time is a complex concept, which is most rigorously analysed by philosophers, physicists and astronomers. History is the systematic study of the past, and at its heart is time.

We describe time as the difference between the past and the future, but where does the difference come from? The laws of science do not distinguish between the past and the future, yet there is a big difference between the past and the future in our ordinary lives….

This increase in disorder or entropy is what distinguishes between the past and the future, giving us as humans a direction to time . Entropy is the only quantity that picks a particular direction of time, sometimes called an arrow of time, hence from our prospective entropy measurement is thought of as…