What is time in the modern understanding and why does it have exactly these properties? Why does time always move in the same direction? Why do irreversible processes exist? Twenty years ago, Stephen Hawking tried to explain time through the Big Bang theory. Now, Sean Carroll, one of the leading theoretical physicists of our time, will introduce you to the fascinating paradigm of time's arrow theory, which spans subjects from the entropy of quantum mechanics to time travel to information theory and the meaning of life.