Does the universe have a watch?

To understand ourselves is to reflect on time. But to to understand time, we need to reflect on ourselves.

-Carlo Rovelli, The Order of Time

I remember A Brief History of Time by the late Stephen Hawking was among the first popular science books I read. However, I ended up wondering why he named his book as a history of time instead of a history of the universe in time. Not until many years later, I found another book containing a glorious and poetic attempt to explore the origin of time. That book is The Order of Time by Carlo Rovelli. He divided…