Here are 14 lessons from the book Why Time Flies: A Mostly Scientific Investigation by Alan Burdick:

1. Time is not a river. It does not flow in one direction. Instead, it is a multi-dimensional construct that is interwoven with space.

2. Our perception of time is subjective. It is influenced by our age, our emotional state, and our environment.

3. Time passes more quickly when we are busy and engaged. When we are bored, time seems to drag on.

4. Our brains have specialized circuits for processing time. These circuits are involved in functions such as memory, attention, and planning.

5. Our perception of time changes as we age. Children tend to underestimate the passage of time, while adults tend to overestimate it.

6. Time dilation is a real phenomenon. It is caused by the curvature of spacetime. Time passes more slowly for objects that are moving at high speeds or in strong gravitational fields.

7. Time travel is theoretically possible. However, it is unlikely that we will ever be able to travel back in time.

8. Quantum mechanics suggests that time may not be linear. It is possible that the past, present, and future exist simultaneously.

9. The arrow of time is a mystery. We do not know why time flows in one direction and not the other.

10. Time is a precious resource. We should make the most of the time that we have.

In addition to these core lessons, the book also teaches us about the following:

11. The history of timekeeping. Burdick traces the development of timekeeping devices from the sundial to the atomic clock.

12. The role of time in culture. Burdick examines how different cultures have conceptualized and experienced time throughout history.

13. The relationship between time and memory. Burdick explains how our memories are influenced by our perception of time.

14. The neuroscience of time perception. Burdick discusses the research that has been done on how our brains process time.