# 21 grams experiment

> 1907 pseudo-scientific study by Duncan MacDougall

**Wikidata**: [Q3393257](https://www.wikidata.org/wiki/Q3393257)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/21_grams_experiment)  
**Source**: https://4ort.xyz/entity/21-grams-experiment


## References

1. Hypothesis Concerning Soul Substance Together with Experimental Evidence of The Existence of Such Substance