Welcome to the commune podcast. My name is Jeff Krasna. So many of you may receive my weekly

Sunday commusing article where I address a breath of issues from the spiritual to the physiological

to the sociopolitical. And on occasion, I will also record an audio version of these articles and release it here as a bonus episode.

Today's musing focuses on a potent anti-aging tool, sauna.

Sauna bathing is a cornerstone of my daily health and longevity routine for reasons that will become quite clear by the end of

this episode. I often say that disease is a normal and expected result of our Paleolithic biology

trying to cope with our modern lifestyle. I'd like to underscore this notion by leveraging my great, great,

great, great, great, great, grandfather, time 600, who lived as a hunter-gatherer in the year 10,321 BC.

His name was Fege Ansar, which is just my name spelled backwards.

So Fedge's lifestyle and ecosystem mirrored those of hundreds of previous generations.

And across vast swaths of time, human biology evolved in relationship to its environment.

I have virtually the exact same biology as Fetch,

but our cultural conditions could not be more different. For example, Fedge spent all of his time

outdoors, and on average Americans spend 94% of their time indoors.

And what is there a lot of outside?

Yes, light.

Our biology evolved to take advantage of the entire spectrum of light.

On one side of that spectrum is ultraviolet radiation, spanning 100 to 400 nanometers in wavelength.

Our bodies need UVB light to create vitamin D,

although too much UV light damages ourselves,

and you may know this as a sunburn.

Then comes the spectrum of light from 400 to 700 nanometers in wavelength.

...