How big is the visible universe and how long is it known?
The answer is 13.8 billion light years.
What is the number of atoms in the human body?
The answer is 1 - 1 is followed by 28 zeros, which is 1 million times more than the number of stars in the visible universe.
How many thoughts does a person have in his life?
The answer is about 1 billion – the approximate result of the intermittent period (also known as the latency) between the impulses of the brain's electrical activity (action potential) used by neurons to communicate with each other.
How far away is eternity?
In the subatomic world, 10 minutes is an eternity.
The biggest shock to me from the book "The Principle of Everything" is that it breaks the shackles of self-perception in daily life, especially in the feeling of the scale of real space, this book not only takes me to the edge of the universe and time to get a glimpse of the end, but also takes me deep into the core of the quantum world to stop and go. It can be said that this book starts from the scientific and empirical method, but the result gives me a sense of epiphany of "one flower, one world, one leaf and one Bodhi".
From physics to sociology to philosophy to metaphysics, it's interesting to see a dark thread running through it.