Would you want a fly's reaction speed if your life was
Chapter 1

The proportional theory of time

Chapter 2

The busy brain and memory making

Chapter 3

Biological clocks and heartbeats

Chapter 4

The cultural speedup of modern life

YOUR GOAL

Master of Why time flies as we age

Ch 3 · Biological clocks and heartbeats
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dash Why high body temperatures warp time

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dash Why Time Flies

Ten percent when you are ten, Two percent when fifty starts, Life is just a shrinking fraction!

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dash Measuring vision with flicker fusion frequency

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Why high body temperatures warp time

dash A higher body temperature speeds up the brain's internal chemical clock.

Aug 8

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Measuring vision with flicker fusion frequency

dash The rate at which eyes process flashes of light determines the speed of sight.

Aug 8

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Life's Little Ticker
BETA

dash Play this game to explore the math behind biological clocks, heartbeats, and why time seems to speed up as we get older.

Aug 8

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Fun Fact

Fly vision: A housefly perceives time about four times faster than a human, which is why hitting one with a newspaper is so difficult.

Aug 8

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Gossip

Would you want a fly's reaction speed if your life was shorter?

Aug 8

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Quiz

Which psychologist discovered the link between body temperature and time perception using his feverish wife?

Aug 8

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dash The high-speed metabolism of small animals

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Quiz

What is the threshold at which an animal's eye perceives flashing light as a steady beam?

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dash How a slowing pulse alters time

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Quiz

In what year did researchers publish the landmark study linking animal size, metabolism, and time perception?

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Quiz

What physiological change in aging humans contributes to the feeling that external time is speeding up?

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Quiz

How does a high fever affect a person's perception of time?

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Quiz

How do metabolic rates in smaller animals generally compare to larger animals?

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Quiz

Why can houseflies escape fly swatters so easily?

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Quiz

What is the typical human critical flicker fusion frequency in hertz?

Aug 8