The 1953 Everest field notes that explain modern insomnia.

In 1953, during the first successful British expedition up Mount Everest, the medical officer noticed something in his notebook that he never published.

The Sherpas they hired — men in their 60s and 70s who ran supplies up to the high camps in canvas boots that had been resoled twice — were sleeping six hours a night in unheated tents at 20,000 feet. They were waking up calm, relaxed, with resting pulses in the fifties. Meanwhile the British climbers, sleeping in state-of-the-art insulated gear on synthetic Karrimat sleeping pads, were waking up exhausted, anxious, and with racing hearts they could feel through their sleeping bags.

The medical officer, Griffith Pugh, wrote one line in his field notebook that was only surfaced decades later, in his archived papers at the National Library of Scotland:

"The men who slept on the ground slept well. The men who slept above it did not."

At the time, in 1953, no one could explain it. Now we can.

The thing every body on Earth used to do.

The Earth itself carries a small, constant negative electrical charge. It is a measurable, physical property of the planet — the same property that makes lightning strikes ground out, the same property that causes static buildup, the same property the third pin on every wall socket in your house is connected to.

Every creature on the planet — except modern humans — spends most of its life in direct contact with that charge through skin-to-ground contact. Foxes do. Sheep do. Babies who haven't started wearing shoes yet do. Sherpa porters in canvas boots whose soles have worn paper-thin do.

The reconnection between a living body and the Earth's negative charge is called grounding, and the research over the last fifteen years suggests it is one of the primary ways the human nervous system regulates inflammation, stress, and sleep architecture overnight.

What we built that broke it.

Somewhere in the last 150 years, we built shoes with rubber soles. Cars with rubber tyres. Synthetic foam mattresses. Metal-framed beds set on plywood platforms. Houses on insulated concrete foundations. Office floors of vinyl over concrete over more concrete. We built every modern indoor surface to be electrically isolated from the planet beneath it.

Each of those inventions is, individually, useful. Rubber-soled shoes don't slip in the wet. Synthetic mattresses don't grow mould. Concrete foundations stop houses from sinking. Together, they have done something to humanity that no one has fully accounted for: they have cut us off from the Earth's electrical field, twenty-four hours a day, for a hundred and fifty years.

The first generation to live entirely insulated from the planet they evolved on is the same generation that, by every measurable marker — cortisol curves, heart rate variability, deep-sleep duration, inflammation markers, autoimmune incidence — cannot sleep.

What this looks like in 2026.

You cannot move to the high Himalayas. Most of us cannot move into a 19th-century farmhouse with dirt floors, and even if we could, the modern world would still demand our shoes on for sixteen hours a day.

But you can do the one thing that matters most, which is reconnect your body during the eight hours when it is supposed to be doing its overnight repair work: while you sleep.

The most practical way to do that, that I am aware of after several months of reading, is a stainless-steel grounding sheet. The brand I use is a small Australian company called Premium Grounding. The sheet goes under your fitted sheet. A thin cord plugs into the earth pin of any wall socket — the third pin, the one connected to the actual ground beneath your house. No electricity flows through it. No batteries. The stainless-steel thread woven through the fabric simply carries the Earth's negative charge into the body of whoever is sleeping on the sheet, the way the dirt floor of a Sherpa hut would.

What I have observed.

I am 57 years old, I retired two years ago after thirty-one years in industrial maintenance, and I am the kind of person whose default position on wellness products is profound skepticism. I bought one because I had read enough of the actual research to believe there was something there, and the 90-night trial meant I could not lose money on it.

It has been four months. My resting heart rate dropped from 68 to 61 in the first eight weeks. My HRV went up nineteen percent. The lower-back pain that used to wake me at 3am most nights has gone from "most nights" to "maybe twice a month." My wife noticed it before I did and started sleeping on her side of the bed (where the cord plugs in) instead of mine.

I am not telling you grounding is magic. I am telling you that something we removed from human life by building it out of rubber and concrete and synthetic foam appears to have been quietly important, and that for me, putting it back during the eight hours I am asleep has done more for my sleep than every supplement, every blackout curtain, and every meditation app of the last decade combined.

If you are 50, 60, 70 years old and you have been told that not sleeping properly is "just part of aging," I want you to consider that those Sherpa porters in 1953, in their canvas boots, sleeping in unheated tents at twenty thousand feet — men in their seventies — were not "just aging." They were doing what every body on Earth is supposed to do at night.

The thing they were doing, you can do too. From your own bed.