In 1901,MacDougall weighed six patients while they were in the process of dying from tuberculosis in an old age home.The determination of the soul weighing 21 grams was based on the average loss of mass in the 6 patients within moments after death
That's creepy, y would a dude weigh dieing people, and actualy, the amount of weight they lost could be from loss of oxygen
Because inside the humanbody, amount of oxygen compress, an throughout the years your loaned capacity shrinks due to exorbation of oxygen, and oxegen starts to weigh a little bit after it's compressed in the pounds for god knows how many years
Also you should point out many scientist tried this and never got the same results. Therefore this isnt proven nor remotely true
That's not the soul. That 'mystery' loss after death is actually the weight of diverse elements in your body and your muscles that change a lot when you die. And also, if you didn't know, when you die you release your last feces and you basically piss yourself, which can be another explanation.
I'm no professor. I'm an earwigs exterminator. Not professional, but I still leave nothing but corpses.
But I like being called professor though. Gives me a fake authority that is unneeded. I also have an imaginary PhD.