How time passes! The phrase is so banal that even the news of latest Brexit maneuver feels stimulating. Though a bit shop-worn, it does state pithily, our bafflement with one of the ubiquitous physical entities in our lives. Time is understood little even by physicists. What constitutes the arrow of time, none knows. It would seem that past, present, and future are mere constructs of the human mind. In the space-time matrix of universe, all events are etched indelibly. Future of humanity on Earth may be the past of a planet travelling at vastly different speeds. Construct or real, physicist or layperson; notwithstanding these quibbles, human mind knows what is passage of time. We remember our past, not our future. We hanker after past joys ruefully and fret over the unknown vicissitudes future may bring. It's been a year since I came to the city. How time- No, I won't repeat it. Ethologists, evolutionary psychologists and biologists tell me that we have inherite...