The Origin
Every few years, the internet rediscovers one of the most unusual scientific claims ever made: that the human soul weighs exactly 21 grams. TikTok recycles it, Reddit debates it, YouTube retells it. And suddenly, we’re all asking the same ancient question:
“What actually leaves us when we die?”
In today’s video from Today I Found Out, we revisit Dr. Duncan MacDougall — a physician in early-1900s Massachusetts who tried to weigh the soul as it departed the body. His methods were bold, questionable, and deeply human.
Full credit to Today I Found Out — YouTube: @TodayIFoundOut
In 1901, MacDougall placed six terminal patients on a specially built scale-bed designed to detect tiny drops in weight at the moment of death. His first patient, he claimed, lost 21.3 grams instantly. This was the birth of the myth.
But what followed was far less tidy:
He repeated the experiment on dogs — and saw no change. He concluded dogs had no souls. He then tried to photograph the soul using X-rays. His results, as expected, went nowhere.
MacDougall’s work doesn’t tell us anything about souls. But it reveals three colossal truths about human psychology:
In other words, we are not desperate for data. We are desperate for meaning.
Modern science rejects the 21-gram claim. There is no measurable mass tied to consciousness, identity, memory, emotion, dreams, or the strange spark we call “self.”
But here is what is measurable:
Miss Ref wrote recently about the single factor that most doctors forget to ask about:
The Invisible Killer That Doctors Forget to Ask About
It’s not the mass of a soul that breaks us. It’s the weight of unprocessed life.
Why does this story refuse to die?
Because the idea matters more than the measurement.
The belief that you weigh more alive than dead is the belief that your existence leaves an imprint on the universe.
And Self Evidence exists precisely for that reason — to explore the strange, philosophical, psychological machinery inside us.
If you’re new, start with our foundational map of the SE universe:
The Rise of C.J. Cauldin & Miss Referee’s 10-Year Plan
The 21-gram soul is not science. But it is something just as important: a story about our longing to matter.
Question: If your soul had weight, what would you want it to be made of?
🧩 Block 0114: [The Myth of the 21-Gram Soul: Why Humans Need Stories to Explain The Unexplainable]
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