At the end of 21 Grams (2003), the teller said, “They say we all loose 21 grams at the exact moment of our death.” I’m just interested in what that 21 grams means which caused the makers to entitle the movie 21 Grams.
The Wikipedia article on Dr. Duncan MacDougall says,
Dr. Duncan “Om” MacDougall (c. 1866 – October 15, 1920) was an early 20th-century physician in Haverhill, Massachusetts who sought to measure the mass lost by a human when the soul departed the body at death. MacDougall attempted to measure the mass change of six patients at the moment of death. His first subject, the results from which MacDougall felt were most accurate, lost “three-fourths of an ounce”, which has since been popularized as “21 grams”.
21 Grams is a 2003 American drama film which references the notion that the human soul has mass, more specifically that it weighs twenty-one grams.