It was a couple of ounces, which the other researchers thought was because, like you said, due to air, as well as evaporation of sweat (the patients were sweaty, I guess?) and other things that could be explained by looking at the biology. However, the head researcher was all like, "NOO NOO the soul does have weight, SEE this ONE patient out of LIEK TWENTY had lost a few ounces when he died". *shakes head* Some scientists will never admit that their experiment didn't produce the results they wanted. That is what I call BAD SCIENCE.