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In the first half of the day, dopamine and norepinephrine are elevated in the brain, body, and bloodstream much more than serotonin. This affects our perception of time and suggests we should tackle the hardest tasks early in the day.

The more dopamine that's released into our brain, the more we tend to overestimate how much time has passed. These experiments are very straightforward and objective. At the 38-second mark, people might say, "I think a minute is up."

Entrainment is the way in which your internal processes, your brain, and your body synchronize with external time cues.

Altradian rhythms, about 90 minutes long, govern our ability to focus and engage in mental or physical work.

For more on time perception, check out 'Your Brain is a Time Machine: The Neuroscience and Physics of Time' by Dean Bornomano, a world expert in the field.

Habits in the context of dopamine reward and time perception mean placing specific routines at intervals. This leads to dopamine release related to reward, motivation, and feeling good.

Our perception of time is perhaps the most important factor in how we gauge our life.

The ability to perceive time accurately is fundamental to performing tasks well.

You have two clocks: a dopaminergic stopwatch that fine slices really closely, and another that gathers big time bins. Depending on whether you're excited or bored, you're using different stopwatches, perceiving your experience differently.

We are driven by these timers that vary depending on our level of excitement because of neuromodulators like dopamine and serotonin.