2 – 3 Billion Heartbeats

While randomly browsing the internet, I came across the chart below [source]. A curious mind should ask, why do smaller animals like mouse and rat live for lesser time than bigger animals like whale and elephant? Before reading further spend some time to form your hypothesis. Click here to read the rest.


10 thoughts on “2 – 3 Billion Heartbeats

  1. Nice Post Jana. Just to add another example would be a tortoise. Their lifespan could be as much as 100 years and can go upto 200 years. One reason I think could be the deep and slow breathing of the tortoise.

    Correct me if I am wrong. Thank you.

    • Searching the internet, I found that Galapagos tortoise which has a resting heartbeat of 6 beats per min. They live for 175+ years.


  2. Think we live longer than ~1 billion heartbeats is cause we brush our tooth (hence can eat till very old age). What would be the case if all animals did that? an Experiment could be tried.

  3. If you compare to humans in the ancestral state (i.e. hunter-gatherers) you would probably get close to 1 billion heartbeats there too. Animals, by and large, get acutely sick, get eaten or starve to death whereas modern humans do not. We aren’t blessed by evolution as much as blessed by modernity and conditions of non-scarcity.

  4. Hi Jana,
    Thanks for sharing the article. Wonderful food for thought.
    In the end, you mentioned that stressed mind causes adrenaline, which increases heart rate. When one exercises, heart rate increases there too. Using above logic, how could we differentiate between two?

    • Excellent question, Kushal. I don’t know the answer for sure. The only explanation is that while exercising our brain secrets endorphins, which reduces stress and depression.


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