Why Does Time Pass?
Physics tells us that time should be able to go backward as well as forward. But through our experience on the planet, we know that it cannot. Humans live in a perpetual present, inexorably sealed off from the past, but moving relentlessly into the future. For most people, time seems to be something that is just out there and seems to go in one direction and in one direction only. But physicists see it much differently. Find out why in this intriguing episode of The Economist.
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