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Extra Life

I just finished the book Extra Life: The Astonishing Story of How We Doubled Our Lifespan by Steven Johnson.

We now live an extra life longer (20,000 hours of life more) than we used to!

Human life expectancy more than doubled over the past century:

What made this happen?

It wasn't doctors.

One thing we have done is helped more infants live through adolescence. This brings up the average of our life expectency. Additionally, he gives several other reasons.

3 factors account for saving the lives of billions:

5 factors account for saving the lives of hundreds of millions:

Those that have saved millions are those we attribute to doctors such as:

These 21 factors account for the bulk of why we are living so much longer per this author ... and I think he's right.


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