Some say that we all lost 21 grams when we died. This is a short sentence that attracts attention, but there is no scientific truth.
For hundreds of years, perhaps thousands of years, people believed that the "soul" had a certain physical existence. In 1907, Dr. Duncan MacDougall from Haverhill, Massachusetts, trying to weigh the soul. For his research, he collected six dying patients. In his office, it has a special bed that is "composed of a lightweight frame with a very sensitive scale". He confirmed that the scale was accurate to two-tenths of an ounce (around 5.7 kg). Knowing that people who are dying do uncontrolled and confused movements with such a difficult set of scales. he decided to "select patients who are dying, that is, choose patients who suffer from diseases that result in extreme fatigue, so that death occurs with little or no muscle movement, because in such cases, the board will be more balanced and any losses that occur will be easily recorded ".
in April 1907 in the issue of the journal American Medicine. He confirmed that he had measured weight loss when people died, what he said related to the soul that left the body. He wrote, from the bedside of one of his patients, that "after 3 hours and 40 minutes, he died and suddenly along with his death, the needle of the scale moved down with a sound, and remained there without bouncing back. Weight loss is confirmed to be three quarters of an ounce.