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13 Examples of Time

Time is the movement of events from past to future. This is a basic element of science and the human experience that is nonetheless not well understood. The following are examples of ideas, theories and observations about time.

Arrow of Time

Arrow of time is the observation that time moves in one direction from past to future.

Cause and Effect

Cause and effect is the observation that one thing causes another. Due to the arrow of time, these sequences of events can never be changed once they occur. For example, if you jump off a diving board, this jump can't be reversed such that your landing becomes inevitable.


Entropy is the observation that things (isolated systems) move in one direction from simple to complex. For example, the information required to describe the universe is constantly increasing as it expands and ages. As such, time could be described as a process of entropy -- ever increasing complexity, decay and chaos.


The theory that time is a forth dimension alongside length, width and height. Time is unique amongst these dimensions because it can only be traveled in one direction.

Time Preciousness

The observation that time is the most constrained thing that humans need whereby you can get more water, food, space, love or money but lifespan appears to be inherently limited.


As you can only travel in one direction in time, you can never return to a moment. This creates melancholy feelings about time known as nostalgia.

We Are Time

The idea that the past and future do not independently exist but are part of the human experience in forms such as memory, nostalgia, anticipation and prediction. If time were nothing more than a human cognitive device, it may be difficult for us to understand a timeless universe.

Subjective Time

The theory that humans perceive time differently such that things are moving faster for some people than others. For example, the theory that time moves faster as you age.

Biological Time

Perception of time is related to the size of an organism and its metabolism. For example, birds appear to perceive visual information in faster streams than humans. As such, a human generally appears to be slow from the perspective of a bird. Humans may appear to be fast from the perceptive of an animal with a slow metabolism such as a turtle.

Time Dilation

According to the General Theory of Relativity, time slows down as you move faster. This has been repeatedly confirmed with experiments and is hard science.

Time At Speed of Light

Due to time dilation, time stops at the speed of light. If you are moving at the speed of light away from a clock you can look back forever but the clock will never move from your perspective.

Time Distortion

Time distortion, better known as Gravitational time dilation, is the observation that time moves slower at high gravity (created by proximity to a large mass). For example, time moves faster on an airplane than on the ground. As with speed dilation, time can stop with high enough gravity such as on the surface of a black hole that theoretically has infinite gravity.

Wheel of Time

Several religions and philosophical theories view time as a cycle that is repeated. This is similar to the Big Crunch hypothesis of physics that predicts that expansion of the universe will eventually reverse. This would imply that the size of the universe would ultimately approach zero, presumably creating the conditions for another Big Bang.


Biological time is the reason that it is generally difficult for a human to capture a bird with our hands. Even if we move as fast as a bird such as a chicken, the bird perceives events quickly such that we appear to be moving in slow motion from the bird's perspective.
Overview: Time Examples
The movement of events from past to future.
Related Concepts

Time Examples

This is the complete list of articles we have written about time examples.
Arrow Of Time
Slow Things
Time Examples
Time Pressure
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Boström, Jannika E., et al. "Ultra-rapid vision in birds." PLoS One 11.3 (2016): e0151099.
Block, Richard A., and Simon Grondin. "Timing and time perception: A selective review and commentary on recent reviews." Frontiers in psychology 5 (2014): 648.


An overview of the physics of time.

Arrow Of Time

The definition of the arrow of time with examples.


A definition of entropy with examples.

Time Opposite

The opposites of time.

Way Of Life

An overview of way of life with examples.


A list of night things.


An overview of matter with examples.

Time Strengths

A list of time management strengths.


A list of the branches of physics.

Science Topics

An overview of common science topics.


An overview of the common types of engineering.


An overview of the branches of geology.


Examples of measurement including common tools, measurements and units.

Hot Things

A list of hot things (temperature).

Words To Describe Research

A vocabulary for describing research.

Bright Things

A list of things that are bright.
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