Overview of "Elephant’s time and mouse’s time"
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Overview of "Elephant’s time and mouse’s time"

I will introduce about the Japanese book “Elephant’s time and mouse’s time (Zou no zikan nezumi no zikan)” It is written in Japanese only. If you can read Japanese book, so you should read this book. I wrote an overview for those who read with using dictionary.


Introduction "Elephant’s time and mouse’s time"

Is time feeling of elephant and mouse different?


Elephant is much bigger than mouse. So, the recognition of the same thing differs between both animals. A flat road for an elephant can be a bumpy road for a mouse. Furthermore, the author says that if they experience same time, but the time span they feel is can be different. There are two reasons.


1. The more weight of a mammal, the slower their beat of the heart and the lower the breathing frequency. So the larger the animal, the less dull the activity itself.

2. In mammals, all animals beat their heart about 2 billion times in their life time.


Although their lifespan is different, each mammals’ feeling lifetime might be same.


Is there a limit on the number of heartbeat ?


This book doesn’t say there is a limit of heart beating times. It only says that mammals die on about 2 billion times heart beating. The cause of death includes predation or disease etc. 2 billion times when the heart beats, human beings are about 50 years old. (Calculated heart beating frequency: 80/min) The average lifetime of modern Japanese people exceeds 80 years old.

I think we should carefully live added life time span (30 years) that human beings grabbed themselves due to the development of medicine, improvement of hygiene environment, change of diet and so on.


The book I introduced this time is a good book that we can understand without science knowledge. This book is written about not only mammals but also insects and etc.